v+

3.8.9

build.gradle

@@ -1,3 +1,5 @@
+import xyz.jpenilla.runpaper.task.RunServer
+
 /*
  * Iris is a World Generator for Minecraft Bukkit Servers
  * Copyright (c) 2021 Arcane Arts (Volmit Software)
@@ -30,10 +32,11 @@ plugins {
     id 'java-library'
     id "io.github.goooler.shadow" version "8.1.7"
     id "de.undercouch.download" version "5.0.1"
+    id "xyz.jpenilla.run-paper" version "2.3.1"
 }
 
 
-version '3.6.5-1.20.1-1.21.4'
+version '3.6.9-1.20.1-1.21.5'
 
 // ADD YOURSELF AS A NEW LINE IF YOU WANT YOUR OWN BUILD TASK GENERATED
 // ======================== WINDOWS =============================
@@ -45,7 +48,7 @@ registerCustomOutputTask('Strange', 'D://Servers/1.17 Test Server/plugins')
 registerCustomOutputTask('Vatuu', 'D://Minecraft/Servers/1.19.4/plugins')
 registerCustomOutputTask('CrazyDev22', 'C://Users/Julian/Desktop/server/plugins')
 registerCustomOutputTask('PixelFury', 'C://Users/repix/workplace/Iris/1.21.3 - Development-Public-v3/plugins')
-registerCustomOutputTask('PixelFuryDev', 'C://Users/repix/workplace/Iris/1.21.4 - Development-v3/plugins')
+registerCustomOutputTask('PixelFuryDev', 'C://Users/repix/workplace/Iris/1.21 - Development-v3/plugins')
 // ========================== UNIX ==============================
 registerCustomOutputTaskUnix('CyberpwnLT', '/Users/danielmills/development/server/plugins')
 registerCustomOutputTaskUnix('PsychoLT', '/Users/brianfopiano/Developer/RemoteGit/Server/plugins')
@@ -53,7 +56,13 @@ registerCustomOutputTaskUnix('PixelMac', '/Users/test/Desktop/mcserver/plugins')
 registerCustomOutputTaskUnix('CrazyDev22LT', '/home/julian/Desktop/server/plugins')
 // ==============================================================
 
+def MIN_HEAP_SIZE = "2G"
+def MAX_HEAP_SIZE = "8G"
+//Valid values are: none, truecolor, indexed256, indexed16, indexed8
+def COLOR = "truecolor"
+
 def NMS_BINDINGS = Map.of(
+        "v1_21_R4", "1.21.5-R0.1-SNAPSHOT",
         "v1_21_R3", "1.21.4-R0.1-SNAPSHOT",
         "v1_21_R2", "1.21.3-R0.1-SNAPSHOT",
         "v1_21_R1", "1.21.1-R0.1-SNAPSHOT",
@@ -62,21 +71,34 @@ def NMS_BINDINGS = Map.of(
         "v1_20_R2", "1.20.2-R0.1-SNAPSHOT",
         "v1_20_R1", "1.20.1-R0.1-SNAPSHOT",
 )
-def JVM_VERSION = Map.of()
-NMS_BINDINGS.each { nms ->
-    project(":nms:${nms.key}") {
+def JVM_VERSION = Map.<String, Integer>of()
+NMS_BINDINGS.forEach { key, value ->
+    project(":nms:$key") {
         apply plugin: 'java'
         apply plugin: 'com.volmit.nmstools'
 
         nmsTools {
-            it.jvm = JVM_VERSION.getOrDefault(nms.key, 21)
-            it.version = nms.value
+            it.jvm = JVM_VERSION.getOrDefault(key, 21)
+            it.version = value
         }
 
         dependencies {
             implementation project(":core")
         }
     }
+
+    tasks.register("runServer-$key", RunServer) {
+        group("servers")
+        minecraftVersion(value.split("-")[0])
+        minHeapSize(MIN_HEAP_SIZE)
+        maxHeapSize(MAX_HEAP_SIZE)
+        pluginJars(tasks.shadowJar.archiveFile)
+        javaLauncher = javaToolchains.launcherFor { it.languageVersion = JavaLanguageVersion.of(JVM_VERSION.getOrDefault(key, 21))}
+        runDirectory.convention(layout.buildDirectory.dir("run/$key"))
+        systemProperty("disable.watchdog", "")
+        systemProperty("net.kyori.ansi.colorLevel", COLOR)
+        systemProperty("com.mojang.eula.agree", true)
+    }
 }
 
 shadowJar {
@@ -92,6 +114,11 @@ shadowJar {
     relocate 'net.kyori', 'com.volmit.iris.util.kyori'
     relocate 'org.bstats', 'com.volmit.util.metrics'
     archiveFileName.set("Iris-${project.version}.jar")
+
+    dependencies {
+        exclude(dependency("org.ow2.asm:asm:"))
+        exclude(dependency("org.jetbrains:"))
+    }
 }
 
 dependencies {
@@ -118,7 +145,7 @@ allprojects {
         maven { url "https://repo.triumphteam.dev/snapshots" }
         maven { url "https://repo.mineinabyss.com/releases" }
         maven { url 'https://hub.jeff-media.com/nexus/repository/jeff-media-public/' }
-        maven { url "https://repo.nexomc.com/snapshots/" }
+        maven { url "https://repo.nexomc.com/releases/" }
         maven { url "https://libraries.minecraft.net" }
     }
 

core/build.gradle

@@ -62,7 +62,7 @@ dependencies {
 
     // Third Party Integrations
     compileOnly 'com.ticxo.playeranimator:PlayerAnimator:R1.2.7'
-    compileOnly 'com.nexomc:nexo:1.0.0-dev.38'
+    compileOnly 'com.nexomc:nexo:1.6.0'
     compileOnly 'com.github.LoneDev6:api-itemsadder:3.4.1-r4'
     compileOnly 'com.github.PlaceholderAPI:placeholderapi:2.11.3'
     compileOnly 'com.github.Ssomar-Developement:SCore:4.23.10.8'

core/src/main/java/com/volmit/iris/Iris.java

@@ -576,9 +576,19 @@ public class Iris extends VolmitPlugin implements Listener {
         Bukkit.getScheduler().cancelTasks(this);
         HandlerList.unregisterAll((Plugin) this);
         postShutdown.forEach(Runnable::run);
-        services.clear();
-        MultiBurst.burst.close();
         super.onDisable();
+
+        J.attempt(new JarScanner(instance.getJarFile(), "", false)::scan);
+        Runtime.getRuntime().addShutdownHook(new Thread(() -> {
+            Bukkit.getWorlds()
+                    .stream()
+                    .map(IrisToolbelt::access)
+                    .filter(Objects::nonNull)
+                    .forEach(PlatformChunkGenerator::close);
+
+            MultiBurst.burst.close();
+            services.clear();
+        }));
     }
 
     private void setupPapi() {
@@ -624,12 +634,22 @@ public class Iris extends VolmitPlugin implements Listener {
             Iris.warn("=");
             Iris.warn("============================================");
         }
-        if (!instance.getServer().getVersion().contains("Purpur")) {
-            passed = false;
+
+        try {
+            Class.forName("io.papermc.paper.configuration.PaperConfigurations");
+        } catch (ClassNotFoundException e) {
+            Iris.info(C.RED + "Iris requires paper or above to function properly..");
+            return false;
+        }
+
+        try {
+            Class.forName("org.purpurmc.purpur.PurpurConfig");
+        } catch (ClassNotFoundException e) {
             Iris.info("We recommend using Purpur for the best experience with Iris.");
             Iris.info("Purpur is a fork of Paper that is optimized for performance and stability.");
             Iris.info("Plugins that work on Spigot / Paper work on Purpur.");
             Iris.info("You can download it here: https://purpurmc.org");
+            return false;
         }
         return passed;
     }
@@ -854,13 +874,6 @@ public class Iris extends VolmitPlugin implements Listener {
             Iris.info("Server type & version: " + C.RED + Bukkit.getVersion());
         } else { Iris.info("Server type & version: " + Bukkit.getVersion()); }
         Iris.info("Java: " + getJava());
-        if (!instance.getServer().getVersion().contains("Purpur")) {
-            if (instance.getServer().getVersion().contains("Spigot") && instance.getServer().getVersion().contains("Bukkit")) {
-                 Iris.info(C.RED + " Iris requires paper or above to function properly..");
-            } else {
-                Iris.info(C.YELLOW + "Purpur is recommended to use with iris.");
-            }
-        }
         if (getHardware.getProcessMemory() < 5999) {
             Iris.warn("6GB+ Ram is recommended");
             Iris.warn("Process Memory: " + getHardware.getProcessMemory() + " MB");

core/src/main/java/com/volmit/iris/core/IrisSettings.java

@@ -23,6 +23,7 @@ import com.volmit.iris.Iris;
 import com.volmit.iris.util.io.IO;
 import com.volmit.iris.util.json.JSONException;
 import com.volmit.iris.util.json.JSONObject;
+import com.volmit.iris.util.misc.getHardware;
 import com.volmit.iris.util.plugin.VolmitSender;
 import lombok.AllArgsConstructor;
 import lombok.Data;
@@ -44,6 +45,7 @@ public class IrisSettings {
     private IrisSettingsStudio studio = new IrisSettingsStudio();
     private IrisSettingsPerformance performance = new IrisSettingsPerformance();
     private IrisSettingsUpdater updater = new IrisSettingsUpdater();
+    private IrisSettingsPregen pregen = new IrisSettingsPregen();
 
     public static int getThreadCount(int c) {
         return switch (c) {
@@ -129,6 +131,7 @@ public class IrisSettings {
         public boolean markerEntitySpawningSystem = true;
         public boolean effectSystem = true;
         public boolean worldEditWandCUI = true;
+        public boolean globalPregenCache = true;
     }
 
     @Data
@@ -141,14 +144,33 @@ public class IrisSettings {
         }
     }
 
+    @Data
+    public static class IrisSettingsPregen {
+        public boolean useCacheByDefault = true;
+        public boolean useHighPriority = false;
+        public boolean useVirtualThreads = false;
+        public boolean useTicketQueue = false;
+        public int maxConcurrency = 256;
+    }
+
     @Data
     public static class IrisSettingsPerformance {
+        private IrisSettingsEngineSVC engineSVC = new IrisSettingsEngineSVC();
         public boolean trimMantleInStudio = false; 
         public int mantleKeepAlive = 30;
         public int cacheSize = 4_096;
         public int resourceLoaderCacheSize = 1_024;
         public int objectLoaderCacheSize = 4_096;
         public int scriptLoaderCacheSize = 512;
+        public int tectonicPlateSize = -1;
+        public int mantleCleanupDelay = 200;
+
+        public int getTectonicPlateSize() {
+            if (tectonicPlateSize > 0)
+                return tectonicPlateSize;
+
+            return (int) (getHardware.getProcessMemory() / 200L);
+        }
     }
 
     @Data
@@ -180,6 +202,7 @@ public class IrisSettings {
         public boolean DoomsdayAnnihilationSelfDestructMode = false;
         public boolean commandSounds = true;
         public boolean debug = false;
+        public boolean dumpMantleOnError = false;
         public boolean disableNMS = false;
         public boolean pluginMetrics = true;
         public boolean splashLogoStartup = true;
@@ -220,4 +243,14 @@ public class IrisSettings {
         public boolean disableTimeAndWeather = true;
         public boolean autoStartDefaultStudio = false;
     }
+
+    @Data
+    public static class IrisSettingsEngineSVC {
+        public boolean useVirtualThreads = true;
+        public int priority = Thread.NORM_PRIORITY;
+
+        public int getPriority() {
+            return Math.max(Math.min(priority, Thread.MAX_PRIORITY), Thread.MIN_PRIORITY);
+        }
+    }
 }

core/src/main/java/com/volmit/iris/core/ServerConfigurator.java

@@ -71,10 +71,12 @@ public class ServerConfigurator {
         f.load(spigotConfig);
         long tt = f.getLong("settings.timeout-time");
 
-        if (tt < TimeUnit.MINUTES.toSeconds(5)) {
-            Iris.warn("Updating spigot.yml timeout-time: " + tt + " -> " + TimeUnit.MINUTES.toSeconds(20) + " (5 minutes)");
+        long spigotTimeout = TimeUnit.MINUTES.toSeconds(5);
+
+        if (tt < spigotTimeout) {
+            Iris.warn("Updating spigot.yml timeout-time: " + tt + " -> " + spigotTimeout + " (5 minutes)");
             Iris.warn("You can disable this change (autoconfigureServer) in Iris settings, then change back the value.");
-            f.set("settings.timeout-time", TimeUnit.MINUTES.toSeconds(5));
+            f.set("settings.timeout-time", spigotTimeout);
             f.save(spigotConfig);
         }
     }
@@ -84,10 +86,11 @@ public class ServerConfigurator {
         f.load(spigotConfig);
         long tt = f.getLong("watchdog.early-warning-delay");
 
-        if (tt < TimeUnit.MINUTES.toMillis(3)) {
-            Iris.warn("Updating paper.yml watchdog early-warning-delay: " + tt + " -> " + TimeUnit.MINUTES.toMillis(15) + " (3 minutes)");
+        long watchdog = TimeUnit.MINUTES.toMillis(3);
+        if (tt < watchdog) {
+            Iris.warn("Updating paper.yml watchdog early-warning-delay: " + tt + " -> " + watchdog + " (3 minutes)");
             Iris.warn("You can disable this change (autoconfigureServer) in Iris settings, then change back the value.");
-            f.set("watchdog.early-warning-delay", TimeUnit.MINUTES.toMillis(3));
+            f.set("watchdog.early-warning-delay", watchdog);
             f.save(spigotConfig);
         }
     }

core/src/main/java/com/volmit/iris/core/commands/CommandDeepSearch.java

@@ -1,134 +0,0 @@
-/*
- * Iris is a World Generator for Minecraft Bukkit Servers
- * Copyright (c) 2022 Arcane Arts (Volmit Software)
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
- */
-
-package com.volmit.iris.core.commands;
-
-import com.volmit.iris.Iris;
-import com.volmit.iris.core.pregenerator.DeepSearchPregenerator;
-import com.volmit.iris.core.pregenerator.PregenTask;
-import com.volmit.iris.core.pregenerator.TurboPregenerator;
-import com.volmit.iris.core.tools.IrisToolbelt;
-import com.volmit.iris.util.data.Dimension;
-import com.volmit.iris.util.decree.DecreeExecutor;
-import com.volmit.iris.util.decree.annotations.Decree;
-import com.volmit.iris.util.decree.annotations.Param;
-import com.volmit.iris.util.format.C;
-import com.volmit.iris.util.math.Position2;
-import org.bukkit.Bukkit;
-import org.bukkit.World;
-import org.bukkit.util.Vector;
-
-import java.io.File;
-import java.io.IOException;
-
-@Decree(name = "DeepSearch", aliases = "search", description = "Pregenerate your Iris worlds!")
-public class CommandDeepSearch implements DecreeExecutor {
-    public String worldName;
-    @Decree(description = "DeepSearch a world")
-    public void start(
-            @Param(description = "The radius of the pregen in blocks", aliases = "size")
-            int radius,
-            @Param(description = "The world to pregen", contextual = true)
-            World world,
-            @Param(aliases = "middle", description = "The center location of the pregen. Use \"me\" for your current location", defaultValue = "0,0")
-            Vector center
-            ) {
-
-        worldName = world.getName();
-        File worldDirectory = new File(Bukkit.getWorldContainer(), world.getName());
-        File TurboFile = new File(worldDirectory, "DeepSearch.json");
-        if (TurboFile.exists()) {
-            if (DeepSearchPregenerator.getInstance() != null) {
-                sender().sendMessage(C.BLUE + "DeepSearch is already in progress");
-                Iris.info(C.YELLOW + "DeepSearch is already in progress");
-                return;
-            } else {
-                try {
-                    TurboFile.delete();
-                } catch (Exception e){
-                   Iris.error("Failed to delete the old instance file of DeepSearch!");
-                   return;
-                }
-            }
-        }
-
-        try {
-            if (sender().isPlayer() && access() == null) {
-                sender().sendMessage(C.RED + "The engine access for this world is null!");
-                sender().sendMessage(C.RED + "Please make sure the world is loaded & the engine is initialized. Generate a new chunk, for example.");
-            }
-
-            DeepSearchPregenerator.DeepSearchJob DeepSearchJob = DeepSearchPregenerator.DeepSearchJob.builder()
-                    .world(world)
-                    .radiusBlocks(radius)
-                    .position(0)
-                    .build();
-
-            File SearchGenFile = new File(worldDirectory, "DeepSearch.json");
-            DeepSearchPregenerator pregenerator = new DeepSearchPregenerator(DeepSearchJob, SearchGenFile);
-            pregenerator.start();
-
-            String msg = C.GREEN + "DeepSearch started in " + C.GOLD + worldName + C.GREEN + " of " + C.GOLD + (radius * 2) + C.GREEN + " by " + C.GOLD + (radius * 2) + C.GREEN + " blocks from " + C.GOLD + center.getX() + "," + center.getZ();
-            sender().sendMessage(msg);
-            Iris.info(msg);
-        } catch (Throwable e) {
-            sender().sendMessage(C.RED + "Epic fail. See console.");
-            Iris.reportError(e);
-            e.printStackTrace();
-        }
-    }
-
-    @Decree(description = "Stop the active DeepSearch task", aliases = "x")
-    public void stop(@Param(aliases = "world", description = "The world to pause") World world) throws IOException {
-        DeepSearchPregenerator DeepSearchInstance = DeepSearchPregenerator.getInstance();
-        File worldDirectory = new File(Bukkit.getWorldContainer(), world.getName());
-        File turboFile = new File(worldDirectory, "DeepSearch.json");
-
-        if (DeepSearchInstance != null) {
-            DeepSearchInstance.shutdownInstance(world);
-            sender().sendMessage(C.LIGHT_PURPLE + "Closed Turbogen instance for " + world.getName());
-        } else if (turboFile.exists() && turboFile.delete()) {
-            sender().sendMessage(C.LIGHT_PURPLE + "Closed Turbogen instance for " + world.getName());
-        } else if (turboFile.exists()) {
-            Iris.error("Failed to delete the old instance file of Turbo Pregen!");
-        } else {
-            sender().sendMessage(C.YELLOW + "No active pregeneration tasks to stop");
-        }
-    }
-
-    @Decree(description = "Pause / continue the active pregeneration task", aliases = {"t", "resume", "unpause"})
-    public void pause(
-            @Param(aliases = "world", description = "The world to pause")
-            World world
-    ) {
-        if (TurboPregenerator.getInstance() != null) {
-            TurboPregenerator.setPausedTurbo(world);
-            sender().sendMessage(C.GREEN + "Paused/unpaused Turbo Pregen, now: " + (TurboPregenerator.isPausedTurbo(world) ? "Paused" : "Running") + ".");
-        } else {
-            File worldDirectory = new File(Bukkit.getWorldContainer(), world.getName());
-            File TurboFile = new File(worldDirectory, "DeepSearch.json");
-            if (TurboFile.exists()){
-                TurboPregenerator.loadTurboGenerator(world.getName());
-                sender().sendMessage(C.YELLOW + "Started DeepSearch back up!");
-            } else {
-                sender().sendMessage(C.YELLOW + "No active DeepSearch tasks to pause/unpause.");
-            }
-
-        }
-    }
-}

core/src/main/java/com/volmit/iris/core/commands/CommandDeveloper.java

@@ -20,7 +20,6 @@ package com.volmit.iris.core.commands;
 
 import com.volmit.iris.Iris;
 import com.volmit.iris.core.ServerConfigurator;
-import com.volmit.iris.core.loader.IrisData;
 import com.volmit.iris.core.nms.datapack.DataVersion;
 import com.volmit.iris.core.service.IrisEngineSVC;
 import com.volmit.iris.core.tools.IrisPackBenchmarking;
@@ -36,6 +35,7 @@ import com.volmit.iris.util.format.Form;
 import com.volmit.iris.util.io.CountingDataInputStream;
 import com.volmit.iris.util.io.IO;
 import com.volmit.iris.util.mantle.TectonicPlate;
+import com.volmit.iris.util.math.M;
 import com.volmit.iris.util.nbt.mca.MCAFile;
 import com.volmit.iris.util.nbt.mca.MCAUtil;
 import com.volmit.iris.util.parallel.MultiBurst;
@@ -62,57 +62,49 @@ import java.util.zip.GZIPOutputStream;
 @Decree(name = "Developer", origin = DecreeOrigin.BOTH, description = "Iris World Manager", aliases = {"dev"})
 public class CommandDeveloper implements DecreeExecutor {
     private CommandTurboPregen turboPregen;
+    private CommandLazyPregen lazyPregen;
     private CommandUpdater updater;
 
     @Decree(description = "Get Loaded TectonicPlates Count", origin = DecreeOrigin.BOTH, sync = true)
     public void EngineStatus() {
-        List<World> IrisWorlds = new ArrayList<>();
-        int TotalLoadedChunks = 0;
-        int TotalQueuedTectonicPlates = 0;
-        int TotalNotQueuedTectonicPlates = 0;
-        int TotalTectonicPlates = 0;
+        Iris.service(IrisEngineSVC.class)
+                .engineStatus(sender());
+    }
 
-        long lowestUnloadDuration = 0;
-        long highestUnloadDuration = 0;
+    @Decree(description = "Test")
+    public void dumpThreads() {
+        try {
+            File fi = Iris.instance.getDataFile("dump", "td-" + new java.sql.Date(M.ms()) + ".txt");
+            FileOutputStream fos = new FileOutputStream(fi);
+            Map<Thread, StackTraceElement[]> f = Thread.getAllStackTraces();
+            PrintWriter pw = new PrintWriter(fos);
 
-        for (World world : Bukkit.getWorlds()) {
-            try {
-                if (IrisToolbelt.access(world).getEngine() != null) {
-                    IrisWorlds.add(world);
+            pw.println(Thread.activeCount() + "/" + f.size());
+            var run = Runtime.getRuntime();
+            pw.println("Memory:");
+            pw.println("\tMax: " + run.maxMemory());
+            pw.println("\tTotal: " + run.totalMemory());
+            pw.println("\tFree: " + run.freeMemory());
+            pw.println("\tUsed: " + (run.totalMemory() - run.freeMemory()));
+
+            for (Thread i : f.keySet()) {
+                pw.println("========================================");
+                pw.println("Thread: '" + i.getName() + "' ID: " + i.getId() + " STATUS: " + i.getState().name());
+
+                for (StackTraceElement j : f.get(i)) {
+                    pw.println("    @ " + j.toString());
                 }
-            } catch (Exception e) {
-                // no
-            }
-        }
 
-        for (World world : IrisWorlds) {
-            Engine engine = IrisToolbelt.access(world).getEngine();
-            TotalQueuedTectonicPlates += (int) engine.getMantle().getToUnload();
-            TotalNotQueuedTectonicPlates += (int) engine.getMantle().getNotQueuedLoadedRegions();
-            TotalTectonicPlates += engine.getMantle().getLoadedRegionCount();
-            if (highestUnloadDuration <= (long) engine.getMantle().getTectonicDuration()) {
-                highestUnloadDuration = (long) engine.getMantle().getTectonicDuration();
-            }
-            if (lowestUnloadDuration >= (long) engine.getMantle().getTectonicDuration()) {
-                lowestUnloadDuration = (long) engine.getMantle().getTectonicDuration();
-            }
-            for (Chunk chunk : world.getLoadedChunks()) {
-                if (chunk.isLoaded()) {
-                    TotalLoadedChunks++;
-                }
+                pw.println("========================================");
+                pw.println();
+                pw.println();
             }
+
+            pw.close();
+            Iris.info("DUMPED! See " + fi.getAbsolutePath());
+        } catch (Throwable e) {
+            e.printStackTrace();
         }
-        Iris.info("-------------------------");
-        Iris.info(C.DARK_PURPLE + "Engine Status");
-        Iris.info(C.DARK_PURPLE + "Total Loaded Chunks: " + C.LIGHT_PURPLE + TotalLoadedChunks);
-        Iris.info(C.DARK_PURPLE + "Tectonic Limit: " + C.LIGHT_PURPLE + IrisEngineSVC.getTectonicLimit());
-        Iris.info(C.DARK_PURPLE + "Tectonic Total Plates: " + C.LIGHT_PURPLE + TotalTectonicPlates);
-        Iris.info(C.DARK_PURPLE + "Tectonic Active Plates: " + C.LIGHT_PURPLE + TotalNotQueuedTectonicPlates);
-        Iris.info(C.DARK_PURPLE + "Tectonic ToUnload: " + C.LIGHT_PURPLE + TotalQueuedTectonicPlates);
-        Iris.info(C.DARK_PURPLE + "Lowest Tectonic Unload Duration: " + C.LIGHT_PURPLE + Form.duration(lowestUnloadDuration));
-        Iris.info(C.DARK_PURPLE + "Highest Tectonic Unload Duration: " + C.LIGHT_PURPLE + Form.duration(highestUnloadDuration));
-        Iris.info(C.DARK_PURPLE + "Cache Size: " + C.LIGHT_PURPLE + Form.f(IrisData.cacheSize()));
-        Iris.info("-------------------------");
     }
 
     @Decree(description = "Test")
@@ -128,7 +120,7 @@ public class CommandDeveloper implements DecreeExecutor {
 
         File tectonicplates = new File(folder, "mantle");
         for (File i : Objects.requireNonNull(tectonicplates.listFiles())) {
-            TectonicPlate.read(maxHeight, i);
+            TectonicPlate.read(maxHeight, i, true);
             c++;
             Iris.info("Loaded count: " + c );
 
@@ -234,7 +226,8 @@ public class CommandDeveloper implements DecreeExecutor {
             @Param(description = "base IrisWorld") World world,
             @Param(description = "raw TectonicPlate File") String path,
             @Param(description = "Algorithm to Test") String algorithm,
-            @Param(description = "Amount of Tests") int amount) {
+            @Param(description = "Amount of Tests") int amount,
+            @Param(description = "Is versioned", defaultValue = "false") boolean versioned) {
         if (!IrisToolbelt.isIrisWorld(world)) {
             sender().sendMessage(C.RED + "This is not an Iris world. Iris worlds: " + String.join(", ", Bukkit.getServer().getWorlds().stream().filter(IrisToolbelt::isIrisWorld).map(World::getName).toList()));
             return;
@@ -251,7 +244,7 @@ public class CommandDeveloper implements DecreeExecutor {
             service.submit(() -> {
                 try {
                     CountingDataInputStream raw = CountingDataInputStream.wrap(new FileInputStream(file));
-                    TectonicPlate plate = new TectonicPlate(height, raw);
+                    TectonicPlate plate = new TectonicPlate(height, raw, versioned);
                     raw.close();
 
                     double d1 = 0;
@@ -270,7 +263,7 @@ public class CommandDeveloper implements DecreeExecutor {
                             size = tmp.length();
                         start = System.currentTimeMillis();
                         CountingDataInputStream din = createInput(tmp, algorithm);
-                        new TectonicPlate(height, din);
+                        new TectonicPlate(height, din, true);
                         din.close();
                         d2 += System.currentTimeMillis() - start;
                         tmp.delete();

core/src/main/java/com/volmit/iris/core/commands/CommandEdit.java

@@ -19,17 +19,13 @@
 package com.volmit.iris.core.commands;
 
 import com.volmit.iris.Iris;
-import com.volmit.iris.core.nms.INMS;
 import com.volmit.iris.core.service.StudioSVC;
 import com.volmit.iris.engine.object.*;
 import com.volmit.iris.util.decree.DecreeExecutor;
 import com.volmit.iris.util.decree.DecreeOrigin;
 import com.volmit.iris.util.decree.annotations.Decree;
 import com.volmit.iris.util.decree.annotations.Param;
-import com.volmit.iris.util.decree.specialhandlers.NullableBiomeHandler;
-import com.volmit.iris.util.decree.specialhandlers.NullableRegionHandler;
 import com.volmit.iris.util.format.C;
-import org.bukkit.block.Biome;
 
 import java.awt.*;
 
@@ -55,31 +51,12 @@ public class CommandEdit implements DecreeExecutor {
 
 
     @Decree(description = "Edit the biome you specified", aliases = {"b"}, origin = DecreeOrigin.PLAYER)
-    public void biome(@Param(contextual = false, description = "The biome to edit", defaultValue = "---", customHandler = NullableBiomeHandler.class) IrisBiome biome) {
+    public void biome(@Param(contextual = false, description = "The biome to edit") IrisBiome biome) {
         if (noStudio()) {
             return;
         }
-        if (biome == null) {
-            try {
-                IrisBiome b = engine().getBiome(player().getLocation().getBlockX(), player().getLocation().getBlockY() - player().getWorld().getMinHeight(), player().getLocation().getBlockZ());
-                Desktop.getDesktop().open(b.getLoadFile());
-                sender().sendMessage(C.GREEN + "Opening " + b.getTypeName() + " " + b.getLoadFile().getName().split("\\Q.\\E")[0] + " in VSCode! ");
-            } catch (Throwable e) {
-                Iris.reportError(e);
-                sender().sendMessage("Non-Iris Biome: " + player().getLocation().getBlock().getBiome().name());
-                if (player().getLocation().getBlock().getBiome().equals(Biome.CUSTOM)) {
-                    try {
-                        sender().sendMessage("Data Pack Biome: " + INMS.get().getTrueBiomeBaseKey(player().getLocation()) + " (ID: " + INMS.get().getTrueBiomeBaseId(INMS.get().getTrueBiomeBase(player().getLocation())) + ")");
-                    } catch (Throwable ee) {
-                        Iris.reportError(ee);
-                    }
-                }
-            }
-            return;
-        }
-
         try {
-            if (biome.getLoadFile() == null) {
+            if (biome == null || biome.getLoadFile() == null) {
                 sender().sendMessage(C.GOLD + "Cannot find the file; Perhaps it was not loaded directly from a file?");
                 return;
             }
@@ -92,20 +69,10 @@ public class CommandEdit implements DecreeExecutor {
     }
 
     @Decree(description = "Edit the region you specified", aliases = {"r"}, origin = DecreeOrigin.PLAYER)
-    public void region(@Param(contextual = false, description = "The region to edit", defaultValue = "---", customHandler = NullableRegionHandler.class) IrisRegion region) {
+    public void region(@Param(contextual = false, description = "The region to edit") IrisRegion region) {
         if (noStudio()) {
             return;
         }
-        if (region == null) {
-            try {
-                IrisRegion r = engine().getRegion(player().getLocation().getBlockX(), player().getLocation().getBlockZ());
-                Desktop.getDesktop().open(r.getLoadFile());
-                sender().sendMessage(C.GREEN + "Opening " + r.getTypeName() + " " + r.getLoadFile().getName().split("\\Q.\\E")[0] + " in VSCode! ");
-            } catch (Throwable e) {
-                sender().sendMessage(C.RED + "Failed to get region.");
-            }
-            return;
-        }
         try {
             if (region == null || region.getLoadFile() == null) {
                 sender().sendMessage(C.GOLD + "Cannot find the file; Perhaps it was not loaded directly from a file?");

core/src/main/java/com/volmit/iris/core/commands/CommandIris.java

@@ -24,7 +24,6 @@ import com.volmit.iris.core.loader.IrisData;
 import com.volmit.iris.core.nms.INMS;
 import com.volmit.iris.core.pregenerator.ChunkUpdater;
 import com.volmit.iris.core.service.StudioSVC;
-import com.volmit.iris.core.tools.IrisBenchmarking;
 import com.volmit.iris.core.tools.IrisToolbelt;
 import com.volmit.iris.engine.framework.Engine;
 import com.volmit.iris.engine.object.IrisDimension;
@@ -59,7 +58,6 @@ import java.util.List;
 
 import static com.volmit.iris.Iris.service;
 import static com.volmit.iris.core.service.EditSVC.deletingWorld;
-import static com.volmit.iris.core.tools.IrisBenchmarking.inProgress;
 import static com.volmit.iris.core.safeguard.IrisSafeguard.unstablemode;
 import static com.volmit.iris.core.safeguard.ServerBootSFG.incompatibilities;
 import static org.bukkit.Bukkit.getServer;
@@ -68,14 +66,12 @@ import static org.bukkit.Bukkit.getServer;
 public class CommandIris implements DecreeExecutor {
     private CommandStudio studio;
     private CommandPregen pregen;
-    private CommandLazyPregen lazyPregen;
     private CommandSettings settings;
     private CommandObject object;
     private CommandJigsaw jigsaw;
     private CommandWhat what;
     private CommandEdit edit;
     private CommandFind find;
-    private CommandSupport support;
     private CommandDeveloper developer;
     public static boolean worldCreation = false;
     String WorldEngine;
@@ -175,16 +171,6 @@ public class CommandIris implements DecreeExecutor {
         sender().sendMessage(C.GREEN + "Iris v" + Iris.instance.getDescription().getVersion() + " by Volmit Software");
     }
 
-    //todo Move to React
-    @Decree(description = "Benchmark your server", origin = DecreeOrigin.CONSOLE)
-    public void serverbenchmark() throws InterruptedException {
-        if(!inProgress) {
-            IrisBenchmarking.runBenchmark();
-        } else {
-            Iris.info(C.RED + "Benchmark already is in progress.");
-        }
-    }
-
     /*
     /todo
     @Decree(description = "Benchmark a pack", origin = DecreeOrigin.CONSOLE)

core/src/main/java/com/volmit/iris/core/commands/CommandPregen.java

@@ -39,7 +39,9 @@ public class CommandPregen implements DecreeExecutor {
             @Param(description = "The world to pregen", contextual = true)
             World world,
             @Param(aliases = "middle", description = "The center location of the pregen. Use \"me\" for your current location", defaultValue = "0,0")
-            Vector center
+            Vector center,
+            @Param(description = "Open the Iris pregen gui", defaultValue = "true")
+            boolean gui
             ) {
         try {
             if (sender().isPlayer() && access() == null) {
@@ -50,7 +52,7 @@ public class CommandPregen implements DecreeExecutor {
             IrisToolbelt.pregenerate(PregenTask
                     .builder()
                     .center(new Position2(center.getBlockX(), center.getBlockZ()))
-                    .gui(true)
+                    .gui(gui)
                     .radiusX(radius)
                     .radiusZ(radius)
                     .build(), world);

core/src/main/java/com/volmit/iris/core/commands/CommandStudio.java

@@ -22,7 +22,6 @@ import com.volmit.iris.Iris;
 import com.volmit.iris.core.IrisSettings;
 import com.volmit.iris.core.gui.NoiseExplorerGUI;
 import com.volmit.iris.core.gui.VisionGUI;
-import com.volmit.iris.core.gui.components.IrisRenderer;
 import com.volmit.iris.core.loader.IrisData;
 import com.volmit.iris.core.project.IrisProject;
 import com.volmit.iris.core.service.ConversionSVC;
@@ -66,9 +65,6 @@ import org.bukkit.inventory.Inventory;
 import org.bukkit.util.BlockVector;
 import org.bukkit.util.Vector;
 
-import javax.imageio.ImageIO;
-import java.awt.Color;
-import java.awt.image.BufferedImage;
 import java.io.File;
 import java.io.FileNotFoundException;
 import java.io.IOException;
@@ -160,37 +156,6 @@ public class CommandStudio implements DecreeExecutor {
         sender().sendMessage(C.GREEN + "The \"" + dimension.getName() + "\" pack has version: " + dimension.getVersion());
     }
 
-    @Decree(description = "Debug image")
-    public void printImageChannel(
-            @Param(name = "image", description = "Image found in the image folder inside the project")
-            String image,
-            @Param(name = "channel", description = "Image channel")
-            IrisImageChannel channel
-    ) {
-        if (noStudio()) return;
-        try {
-            File file = new File(access().getEngine().getComplex().getData().getDataFolder(), "images/" + image);
-            if (!file.exists()) {
-                sender().sendMessage(C.RED + "The image \"" + image + "\" does not exist.");
-                return;
-            }
-            BufferedImage buffer = ImageIO.read(file);
-            IrisImage irisImage = new IrisImage(buffer);
-            File at = new File(file.getParentFile(), "debug-see-" + file.getName());
-            BufferedImage b = new BufferedImage(buffer.getWidth(), buffer.getHeight(), BufferedImage.TYPE_INT_RGB);
-            for (int i = 0; i < buffer.getWidth(); i++) {
-                for (int j = 0; j < buffer.getHeight(); j++) {
-                    b.setRGB(i, j, Color.getHSBColor(0, 0, (float) irisImage.getValue(channel, i, j)).getRGB());
-                }
-            }
-            ImageIO.write(b, "png", at);
-            sender().sendMessage(C.IRIS + "Debug image written to ./images for channel " + channel.name());
-        } catch (Exception e) {
-            sender().sendMessage(C.RED + "Something went wrong.. ");
-            e.printStackTrace();
-        }
-    }
-
     @Decree(name = "regen", description = "Regenerate nearby chunks.", aliases = "rg", sync = true, origin = DecreeOrigin.PLAYER)
     public void regen(
             @Param(name = "radius", description = "The radius of nearby cunks", defaultValue = "5")
@@ -439,16 +404,9 @@ public class CommandStudio implements DecreeExecutor {
             @Param(name = "world", description = "The world to open the generator for", contextual = true)
             World world
     ) {
-        if (noGUI()) {
-            sender().sendMessage(C.GOLD + "GUI Support isn't enabled or supported on this server.");
-            return;
-        }
+        if (noGUI()) return;
 
-        if (world == null) {
-            if (noStudio()) return;
-            world = player().getWorld();
-        }
-        else if (!IrisToolbelt.isIrisWorld(world)) {
+        if (!IrisToolbelt.isIrisWorld(world)) {
             sender().sendMessage(C.RED + "You need to be in or specify an Iris-generated world!");
             return;
         }
@@ -884,7 +842,7 @@ public class CommandStudio implements DecreeExecutor {
             sender().sendMessage(C.RED + "No studio world is open!");
             return true;
         }
-       if (engine() == null || !engine().isStudio()) {
+        if (!engine().isStudio()) {
             sender().sendMessage(C.RED + "You must be in a studio world!");
             return true;
         }

core/src/main/java/com/volmit/iris/core/commands/CommandSupport.java

@@ -1,82 +0,0 @@
-/*
- * Iris is a World Generator for Minecraft Bukkit Servers
- * Copyright (c) 2022 Arcane Arts (Volmit Software)
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
- */
-
-package com.volmit.iris.core.commands;
-
-import com.volmit.iris.Iris;
-import com.volmit.iris.core.loader.IrisData;
-import com.volmit.iris.core.pregenerator.ChunkUpdater;
-import com.volmit.iris.core.service.IrisEngineSVC;
-import com.volmit.iris.core.tools.IrisPackBenchmarking;
-import com.volmit.iris.core.tools.IrisToolbelt;
-import com.volmit.iris.engine.framework.Engine;
-import com.volmit.iris.engine.object.IrisDimension;
-import com.volmit.iris.util.collection.KList;
-import com.volmit.iris.util.decree.DecreeExecutor;
-import com.volmit.iris.util.decree.DecreeOrigin;
-import com.volmit.iris.util.decree.annotations.Decree;
-import com.volmit.iris.util.decree.annotations.Param;
-import com.volmit.iris.util.format.C;
-import com.volmit.iris.util.format.Form;
-import com.volmit.iris.util.io.IO;
-import com.volmit.iris.util.mantle.TectonicPlate;
-import com.volmit.iris.util.misc.Hastebin;
-import com.volmit.iris.util.misc.Platform;
-import com.volmit.iris.util.misc.getHardware;
-import com.volmit.iris.util.nbt.mca.MCAFile;
-import com.volmit.iris.util.nbt.mca.MCAUtil;
-import com.volmit.iris.util.plugin.VolmitSender;
-import net.jpountz.lz4.LZ4BlockInputStream;
-import net.jpountz.lz4.LZ4BlockOutputStream;
-import net.jpountz.lz4.LZ4FrameInputStream;
-import net.jpountz.lz4.LZ4FrameOutputStream;
-import org.apache.commons.lang.RandomStringUtils;
-import org.bukkit.Bukkit;
-import org.bukkit.Chunk;
-import org.bukkit.World;
-import oshi.SystemInfo;
-
-import java.io.*;
-import java.net.InetAddress;
-import java.net.NetworkInterface;
-import java.util.*;
-import java.util.concurrent.ExecutorService;
-import java.util.concurrent.Executors;
-import java.util.zip.GZIPInputStream;
-import java.util.zip.GZIPOutputStream;
-
-@Decree(name = "Support", origin = DecreeOrigin.BOTH, description = "Iris World Manager", aliases = {"support"})
-public class CommandSupport implements DecreeExecutor {
-
-    @Decree(description = "report")
-    public void report() {
-        try {
-            if (sender().isPlayer()) sender().sendMessage(C.GOLD + "Creating report..");
-            if (!sender().isPlayer()) Iris.info(C.GOLD + "Creating report..");
-            Hastebin.enviornment(sender());
-
-        } catch (Exception e) {
-            Iris.info(C.RED + "Something went wrong: ");
-            e.printStackTrace();
-        }
-    }
-
-
-}
-
-

core/src/main/java/com/volmit/iris/core/gui/PregeneratorJob.java

@@ -40,7 +40,10 @@ import java.awt.*;
 import java.awt.event.KeyEvent;
 import java.awt.event.KeyListener;
 import java.awt.image.BufferedImage;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
 import java.util.concurrent.TimeUnit;
+import java.util.concurrent.atomic.AtomicReference;
 import java.util.concurrent.locks.ReentrantLock;
 import java.util.function.Consumer;
 
@@ -53,7 +56,7 @@ public class PregeneratorJob implements PregenListener {
     private static final Color COLOR_NETWORK_GENERATING = parseColor("#836b8c");
     private static final Color COLOR_GENERATED = parseColor("#65c295");
     private static final Color COLOR_CLEANED = parseColor("#34eb93");
-    public static PregeneratorJob instance;
+    private static final AtomicReference<PregeneratorJob> instance = new AtomicReference<>();
     private final MemoryMonitor monitor;
     private final PregenTask task;
     private final boolean saving;
@@ -64,14 +67,21 @@ public class PregeneratorJob implements PregenListener {
     private final Position2 max;
     private final ChronoLatch cl = new ChronoLatch(TimeUnit.MINUTES.toMillis(1));
     private final Engine engine;
+    private final ExecutorService service;
     private JFrame frame;
     private PregenRenderer renderer;
     private int rgc = 0;
     private String[] info;
 
     public PregeneratorJob(PregenTask task, PregeneratorMethod method, Engine engine) {
+        instance.updateAndGet(old -> {
+            if (old != null) {
+                old.pregenerator.close();
+                old.close();
+            }
+            return this;
+        });
         this.engine = engine;
-        instance = this;
         monitor = new MemoryMonitor(50);
         saving = false;
         info = new String[]{"Initializing..."};
@@ -96,40 +106,44 @@ public class PregeneratorJob implements PregenListener {
         }, "Iris Pregenerator");
         t.setPriority(Thread.MIN_PRIORITY);
         t.start();
+        service = Executors.newVirtualThreadPerTaskExecutor();
     }
 
     public static boolean shutdownInstance() {
-        if (instance == null) {
+        PregeneratorJob inst = instance.get();
+        if (inst == null) {
             return false;
         }
 
-        J.a(() -> instance.pregenerator.close());
+        J.a(inst.pregenerator::close);
         return true;
     }
 
     public static PregeneratorJob getInstance() {
-        return instance;
+        return instance.get();
     }
 
     public static boolean pauseResume() {
-        if (instance == null) {
+        PregeneratorJob inst = instance.get();
+        if (inst == null) {
             return false;
         }
 
         if (isPaused()) {
-            instance.pregenerator.resume();
+            inst.pregenerator.resume();
         } else {
-            instance.pregenerator.pause();
+            inst.pregenerator.pause();
         }
         return true;
     }
 
     public static boolean isPaused() {
-        if (instance == null) {
+        PregeneratorJob inst = instance.get();
+        if (inst == null) {
             return true;
         }
 
-        return instance.paused();
+        return inst.paused();
     }
 
     private static Color parseColor(String c) {
@@ -179,7 +193,7 @@ public class PregeneratorJob implements PregenListener {
         J.a(() -> {
             pregenerator.close();
             close();
-            instance = null;
+            instance.compareAndSet(this, null);
         });
     }
 
@@ -219,10 +233,10 @@ public class PregeneratorJob implements PregenListener {
     }
 
     @Override
-    public void onTick(double chunksPerSecond, double chunksPerMinute, double regionsPerMinute, double percent, int generated, int totalChunks, int chunksRemaining, long eta, long elapsed, String method) {
+    public void onTick(double chunksPerSecond, double chunksPerMinute, double regionsPerMinute, double percent, long generated, long totalChunks, long chunksRemaining, long eta, long elapsed, String method, boolean cached) {
         info = new String[]{
                 (paused() ? "PAUSED" : (saving ? "Saving... " : "Generating")) + " " + Form.f(generated) + " of " + Form.f(totalChunks) + " (" + Form.pc(percent, 0) + " Complete)",
-                "Speed: " + Form.f(chunksPerSecond, 0) + " Chunks/s, " + Form.f(regionsPerMinute, 1) + " Regions/m, " + Form.f(chunksPerMinute, 0) + " Chunks/m",
+                "Speed: " + (cached ? "Cached " : "") + Form.f(chunksPerSecond, 0) + " Chunks/s, " + Form.f(regionsPerMinute, 1) + " Regions/m, " + Form.f(chunksPerMinute, 0) + " Chunks/m",
                 Form.duration(eta, 2) + " Remaining " + " (" + Form.duration(elapsed, 2) + " Elapsed)",
                 "Generation Method: " + method,
                 "Memory: " + Form.memSize(monitor.getUsedBytes(), 2) + " (" + Form.pc(monitor.getUsagePercent(), 0) + ") Pressure: " + Form.memSize(monitor.getPressure(), 0) + "/s",
@@ -240,13 +254,16 @@ public class PregeneratorJob implements PregenListener {
     }
 
     @Override
-    public void onChunkGenerated(int x, int z) {
-        if (engine != null) {
-            draw(x, z, engine.draw((x << 4) + 8, (z << 4) + 8));
-            return;
-        }
+    public void onChunkGenerated(int x, int z, boolean cached) {
+        if (renderer == null || frame == null || !frame.isVisible()) return;
+        service.submit(() -> {
+            if (engine != null) {
+                draw(x, z, engine.draw((x << 4) + 8, (z << 4) + 8));
+                return;
+            }
 
-        draw(x, z, COLOR_GENERATED);
+            draw(x, z, COLOR_GENERATED);
+        });
     }
 
     @Override
@@ -304,8 +321,9 @@ public class PregeneratorJob implements PregenListener {
     @Override
     public void onClose() {
         close();
-        instance = null;
+        instance.compareAndSet(this, null);
         whenDone.forEach(Runnable::run);
+        service.shutdownNow();
     }
 
     @Override

core/src/main/java/com/volmit/iris/core/gui/VisionGUI.java

@@ -1,6 +1,6 @@
 /*
- *  Iris is a World Generator for Minecraft Bukkit Servers
- *  Copyright (c) 2024 Arcane Arts (Volmit Software)
+ * Iris is a World Generator for Minecraft Bukkit Servers
+ * Copyright (c) 2022 Arcane Arts (Volmit Software)
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -30,6 +30,7 @@ import com.volmit.iris.engine.object.IrisWorld;
 import com.volmit.iris.util.collection.KList;
 import com.volmit.iris.util.collection.KMap;
 import com.volmit.iris.util.collection.KSet;
+import com.volmit.iris.util.data.registry.Attributes;
 import com.volmit.iris.util.format.Form;
 import com.volmit.iris.util.math.BlockPosition;
 import com.volmit.iris.util.math.M;
@@ -56,9 +57,8 @@ import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Executors;
 import java.util.function.BiFunction;
 
-//todo
-// - Misalignment
-// - Weird snapping?
+import static com.volmit.iris.util.data.registry.Attributes.MAX_HEALTH;
+
 public class VisionGUI extends JPanel implements MouseWheelListener, KeyListener, MouseMotionListener, MouseInputListener {
     private static final long serialVersionUID = 2094606939770332040L;
     private final KList<LivingEntity> lastEntities = new KList<>();
@@ -415,8 +415,8 @@ public class VisionGUI extends JPanel implements MouseWheelListener, KeyListener
     }
 
     private double getWorldX(double screenX) {
-        return (mscale * screenX) + ((oxp / scale) * mscale);
-       // return (mscale * screenX) + ((oxp / scale));
+        //return (mscale * screenX) + ((oxp / scale) * mscale);
+        return (mscale * screenX) + ((oxp / scale));
     }
 
     private double getWorldZ(double screenZ) {
@@ -639,7 +639,7 @@ public class VisionGUI extends JPanel implements MouseWheelListener, KeyListener
 
                 k.add("Pos: " + h.getLocation().getBlockX() + ", " + h.getLocation().getBlockY() + ", " + h.getLocation().getBlockZ());
                 k.add("UUID: " + h.getUniqueId());
-                k.add("HP: " + h.getHealth() + " / " + h.getAttribute(Attribute.GENERIC_MAX_HEALTH).getValue());
+                k.add("HP: " + h.getHealth() + " / " + h.getAttribute(MAX_HEALTH).getValue());
 
                 drawCardTR(g, k);
             }

core/src/main/java/com/volmit/iris/core/nms/INMS.java

@@ -34,7 +34,8 @@ public class INMS {
             "1.21.1", "v1_21_R1",
             "1.21.2", "v1_21_R2",
             "1.21.3", "v1_21_R2",
-            "1.21.4", "v1_21_R3"
+            "1.21.4", "v1_21_R3",
+            "1.21.5", "v1_21_R4"
     );
     private static final List<Version> PACKS = List.of(
             new Version(21, 4, "31020"),

core/src/main/java/com/volmit/iris/core/nms/INMSBinding.java

@@ -20,7 +20,6 @@ package com.volmit.iris.core.nms;
 
 import com.volmit.iris.core.nms.container.AutoClosing;
 import com.volmit.iris.core.nms.container.BiomeColor;
-import com.volmit.iris.core.nms.container.Pair;
 import com.volmit.iris.core.nms.datapack.DataVersion;
 import com.volmit.iris.engine.framework.Engine;
 import com.volmit.iris.util.collection.KList;
@@ -94,6 +93,7 @@ public interface INMSBinding {
             throw new IllegalStateException("Missing dimenstion types to create world");
 
         try (var ignored = injectLevelStems()) {
+            ignored.storeContext();
             return c.createWorld();
         }
     }
@@ -132,7 +132,11 @@ public interface INMSBinding {
 
     AutoClosing injectLevelStems();
 
-    Pair<Integer, AutoClosing> injectUncached(boolean overworld, boolean nether, boolean end);
+    default AutoClosing injectUncached(boolean overworld, boolean nether, boolean end) {
+        return null;
+    }
 
     boolean missingDimensionTypes(boolean overworld, boolean nether, boolean end);
+
+    void removeCustomDimensions(World world);
 }

core/src/main/java/com/volmit/iris/core/nms/container/AutoClosing.java

@@ -1,5 +1,6 @@
 package com.volmit.iris.core.nms.container;
 
+import com.volmit.iris.util.collection.KMap;
 import com.volmit.iris.util.function.NastyRunnable;
 import lombok.AllArgsConstructor;
 
@@ -7,6 +8,7 @@ import java.util.concurrent.atomic.AtomicBoolean;
 
 @AllArgsConstructor
 public class AutoClosing implements AutoCloseable {
+    private static final KMap<Thread, AutoClosing> CONTEXTS = new KMap<>();
     private final AtomicBoolean closed = new AtomicBoolean();
     private final NastyRunnable action;
 
@@ -14,9 +16,24 @@ public class AutoClosing implements AutoCloseable {
     public void close() {
         if (closed.getAndSet(true)) return;
         try {
+            removeContext();
             action.run();
         } catch (Throwable e) {
             throw new RuntimeException(e);
         }
     }
+
+    public void storeContext() {
+        CONTEXTS.put(Thread.currentThread(), this);
+    }
+
+    public void removeContext() {
+        CONTEXTS.values().removeIf(c -> c == this);
+    }
+
+    public static void closeContext() {
+        AutoClosing closing = CONTEXTS.remove(Thread.currentThread());
+        if (closing == null) return;
+        closing.close();
+    }
 }

core/src/main/java/com/volmit/iris/core/nms/v1X/NMSBinding1X.java

@@ -126,8 +126,8 @@ public class NMSBinding1X implements INMSBinding {
     }
 
     @Override
-    public Pair<Integer, AutoClosing> injectUncached(boolean overworld, boolean nether, boolean end) {
-        return new Pair<>(0, new AutoClosing(() -> {}));
+    public AutoClosing injectUncached(boolean overworld, boolean nether, boolean end) {
+        return injectLevelStems();
     }
 
     @Override
@@ -135,6 +135,11 @@ public class NMSBinding1X implements INMSBinding {
         return false;
     }
 
+    @Override
+    public void removeCustomDimensions(World world) {
+
+    }
+
     @Override
     public CompoundTag serializeEntity(Entity location) {
         return null;

core/src/main/java/com/volmit/iris/core/pregenerator/ChunkUpdater.java

@@ -28,6 +28,7 @@ import java.util.concurrent.atomic.AtomicInteger;
 import java.util.concurrent.atomic.AtomicLong;
 
 public class ChunkUpdater {
+    private static final String REGION_PATH = "region" + File.separator + "r.";
     private final AtomicBoolean paused = new AtomicBoolean();
     private final AtomicBoolean cancelled = new AtomicBoolean();
     private final KMap<Long, Pair<Long, AtomicInteger>> lastUse = new KMap<>();
@@ -162,12 +163,12 @@ public class ChunkUpdater {
                 J.sleep(50);
             }
 
-            if (rX < dimensions.min.getX() || rX > dimensions.max.getX() || rZ < dimensions.min.getZ() || rZ > dimensions.max.getZ()) {
-                return;
-            }
-            if (!new File(world.getWorldFolder(), "region" + File.separator + rX + "." + rZ + ".mca").exists()) {
-                return;
-            }
+            if (rX < dimensions.min.getX() ||
+                    rX > dimensions.max.getX() ||
+                    rZ < dimensions.min.getZ() ||
+                    rZ > dimensions.max.getZ() ||
+                    !new File(world.getWorldFolder(), REGION_PATH + rX + "." + rZ + ".mca").exists()
+            ) return;
 
             task.iterateChunks(rX, rZ, (x, z) -> {
                 while (paused.get() && !cancelled.get()) {

core/src/main/java/com/volmit/iris/core/pregenerator/IrisPregenerator.java

@@ -31,28 +31,33 @@ import com.volmit.iris.util.math.RollingSequence;
 import com.volmit.iris.util.scheduling.ChronoLatch;
 import com.volmit.iris.util.scheduling.J;
 import com.volmit.iris.util.scheduling.Looper;
+import com.volmit.iris.util.scheduling.PrecisionStopwatch;
 
 import java.util.concurrent.atomic.AtomicBoolean;
-import java.util.concurrent.atomic.AtomicInteger;
 import java.util.concurrent.atomic.AtomicLong;
 import java.util.concurrent.atomic.AtomicReference;
 
 
 public class IrisPregenerator {
+    private static final double INVALID = 9223372036854775807d;
     private final PregenTask task;
     private final PregeneratorMethod generator;
     private final PregenListener listener;
     private final Looper ticker;
     private final AtomicBoolean paused;
     private final AtomicBoolean shutdown;
+    private final RollingSequence cachedPerSecond;
     private final RollingSequence chunksPerSecond;
     private final RollingSequence chunksPerMinute;
     private final RollingSequence regionsPerMinute;
     private final KList<Integer> chunksPerSecondHistory;
-    private static AtomicInteger generated;
-    private final AtomicInteger generatedLast;
-    private final AtomicInteger generatedLastMinute;
-    private static AtomicInteger totalChunks;
+    private final AtomicLong generated;
+    private final AtomicLong generatedLast;
+    private final AtomicLong generatedLastMinute;
+    private final AtomicLong cached;
+    private final AtomicLong cachedLast;
+    private final AtomicLong cachedLastMinute;
+    private final AtomicLong totalChunks;
     private final AtomicLong startTime;
     private final ChronoLatch minuteLatch;
     private final AtomicReference<String> currentGeneratorMethod;
@@ -74,46 +79,71 @@ public class IrisPregenerator {
         net = new KSet<>();
         currentGeneratorMethod = new AtomicReference<>("Void");
         minuteLatch = new ChronoLatch(60000, false);
+        cachedPerSecond = new RollingSequence(5);
         chunksPerSecond = new RollingSequence(10);
         chunksPerMinute = new RollingSequence(10);
         regionsPerMinute = new RollingSequence(10);
         chunksPerSecondHistory = new KList<>();
-        generated = new AtomicInteger(0);
-        generatedLast = new AtomicInteger(0);
-        generatedLastMinute = new AtomicInteger(0);
-        totalChunks = new AtomicInteger(0);
+        generated = new AtomicLong(0);
+        generatedLast = new AtomicLong(0);
+        generatedLastMinute = new AtomicLong(0);
+        cached = new AtomicLong();
+        cachedLast = new AtomicLong(0);
+        cachedLastMinute = new AtomicLong(0);
+        totalChunks = new AtomicLong(0);
         task.iterateAllChunks((_a, _b) -> totalChunks.incrementAndGet());
         startTime = new AtomicLong(M.ms());
         ticker = new Looper() {
             @Override
             protected long loop() {
                 long eta = computeETA();
-                int secondGenerated = generated.get() - generatedLast.get();
-                generatedLast.set(generated.get());
-                chunksPerSecond.put(secondGenerated);
-                chunksPerSecondHistory.add(secondGenerated);
 
-                if (minuteLatch.flip()) {
-                    int minuteGenerated = generated.get() - generatedLastMinute.get();
-                    generatedLastMinute.set(generated.get());
-                    chunksPerMinute.put(minuteGenerated);
-                    regionsPerMinute.put((double) minuteGenerated / 1024D);
+                long secondCached = cached.get() - cachedLast.get();
+                cachedLast.set(cached.get());
+                cachedPerSecond.put(secondCached);
+
+                long secondGenerated = generated.get() - generatedLast.get() - secondCached;
+                generatedLast.set(generated.get());
+                if (secondCached == 0 || secondGenerated != 0) {
+                    chunksPerSecond.put(secondGenerated);
+                    chunksPerSecondHistory.add((int) secondGenerated);
                 }
 
-                listener.onTick(chunksPerSecond.getAverage(), chunksPerMinute.getAverage(),
+                if (minuteLatch.flip()) {
+                    long minuteCached = cached.get() - cachedLastMinute.get();
+                    cachedLastMinute.set(cached.get());
+
+                    long minuteGenerated = generated.get() - generatedLastMinute.get() - minuteCached;
+                    generatedLastMinute.set(generated.get());
+                    if (minuteCached == 0 || minuteGenerated != 0) {
+                        chunksPerMinute.put(minuteGenerated);
+                        regionsPerMinute.put((double) minuteGenerated / 1024D);
+                    }
+                }
+                boolean cached = cachedPerSecond.getAverage() != 0;
+
+                listener.onTick(
+                        cached ? cachedPerSecond.getAverage() : chunksPerSecond.getAverage(),
+                        chunksPerMinute.getAverage(),
                         regionsPerMinute.getAverage(),
-                        (double) generated.get() / (double) totalChunks.get(),
-                        generated.get(), totalChunks.get(),
-                        totalChunks.get() - generated.get(),
-                        eta, M.ms() - startTime.get(), currentGeneratorMethod.get());
+                        (double) generated.get() / (double) totalChunks.get(), generated.get(),
+                        totalChunks.get(),
+                        totalChunks.get() - generated.get(), eta, M.ms() - startTime.get(), currentGeneratorMethod.get(),
+                        cached);
 
                 if (cl.flip()) {
                     double percentage = ((double) generated.get() / (double) totalChunks.get()) * 100;
-                    if (!IrisPackBenchmarking.benchmarkInProgress) {
-                        Iris.info("Pregen: " + Form.f(generated.get()) + " of " + Form.f(totalChunks.get()) + " (%.0f%%) " + Form.f((int) chunksPerSecond.getAverage()) + "/s ETA: " + Form.duration(eta, 2), percentage);
-                    } else {
-                        Iris.info("Benchmarking: " + Form.f(generated.get()) + " of " + Form.f(totalChunks.get()) + " (%.0f%%) " + Form.f((int) chunksPerSecond.getAverage()) + "/s ETA: " + Form.duration(eta, 2), percentage);
-                    }
+
+                    Iris.info("%s: %s of %s (%.0f%%), %s/s ETA: %s",
+                            IrisPackBenchmarking.benchmarkInProgress ? "Benchmarking" : "Pregen",
+                            Form.f(generated.get()),
+                            Form.f(totalChunks.get()),
+                            percentage,
+                            cached ?
+                                    "Cached " + Form.f((int) cachedPerSecond.getAverage()) :
+                                    Form.f((int) chunksPerSecond.getAverage()),
+                            Form.duration(eta, 2)
+                    );
                 }
                 return 1000;
             }
@@ -121,12 +151,13 @@ public class IrisPregenerator {
     }
 
     private long computeETA() {
-        return (long) (totalChunks.get() > 1024 ? // Generated chunks exceed 1/8th of total?
+        double d = (long) (totalChunks.get() > 1024 ? // Generated chunks exceed 1/8th of total?
                 // If yes, use smooth function (which gets more accurate over time since its less sensitive to outliers)
-                ((totalChunks.get() - generated.get()) * ((double) (M.ms() - startTime.get()) / (double) generated.get())) :
+                ((totalChunks.get() - generated.get() - cached.get()) * ((double) (M.ms() - startTime.get()) / ((double) generated.get() - cached.get()))) :
                 // If no, use quick function (which is less accurate over time but responds better to the initial delay)
-                ((totalChunks.get() - generated.get()) / chunksPerSecond.getAverage()) * 1000
+                ((totalChunks.get() - generated.get() - cached.get()) / chunksPerSecond.getAverage()) * 1000
         );
+        return Double.isFinite(d) && d != INVALID ? (long) d : 0;
     }
 
 
@@ -138,8 +169,10 @@ public class IrisPregenerator {
         init();
         ticker.start();
         checkRegions();
+        var p = PrecisionStopwatch.start();
         task.iterateRegions((x, z) -> visitRegion(x, z, true));
         task.iterateRegions((x, z) -> visitRegion(x, z, false));
+        Iris.info("Pregen took " + Form.duration((long) p.getMilliseconds()));
         shutdown();
         if (!IrisPackBenchmarking.benchmarkInProgress) {
             Iris.info(C.IRIS + "Pregen stopped.");
@@ -234,8 +267,8 @@ public class IrisPregenerator {
     private PregenListener listenify(PregenListener listener) {
         return new PregenListener() {
             @Override
-            public void onTick(double chunksPerSecond, double chunksPerMinute, double regionsPerMinute, double percent, int generated, int totalChunks, int chunksRemaining, long eta, long elapsed, String method) {
-                listener.onTick(chunksPerSecond, chunksPerMinute, regionsPerMinute, percent, generated, totalChunks, chunksRemaining, eta, elapsed, method);
+            public void onTick(double chunksPerSecond, double chunksPerMinute, double regionsPerMinute, double percent, long generated, long totalChunks, long chunksRemaining, long eta, long elapsed, String method, boolean cached) {
+                listener.onTick(chunksPerSecond, chunksPerMinute, regionsPerMinute, percent, generated, totalChunks, chunksRemaining, eta, elapsed, method, cached);
             }
 
             @Override
@@ -244,9 +277,10 @@ public class IrisPregenerator {
             }
 
             @Override
-            public void onChunkGenerated(int x, int z) {
-                listener.onChunkGenerated(x, z);
+            public void onChunkGenerated(int x, int z, boolean c) {
+                listener.onChunkGenerated(x, z, c);
                 generated.addAndGet(1);
+                if (c) cached.addAndGet(1);
             }
 
             @Override

core/src/main/java/com/volmit/iris/core/pregenerator/PregenListener.java

@@ -19,11 +19,15 @@
 package com.volmit.iris.core.pregenerator;
 
 public interface PregenListener {
-    void onTick(double chunksPerSecond, double chunksPerMinute, double regionsPerMinute, double percent, int generated, int totalChunks, int chunksRemaining, long eta, long elapsed, String method);
+    void onTick(double chunksPerSecond, double chunksPerMinute, double regionsPerMinute, double percent, long generated, long totalChunks, long chunksRemaining, long eta, long elapsed, String method, boolean cached);
 
     void onChunkGenerating(int x, int z);
 
-    void onChunkGenerated(int x, int z);
+    default void onChunkGenerated(int x, int z) {
+        onChunkGenerated(x, z, false);
+    }
+
+    void onChunkGenerated(int x, int z, boolean cached);
 
     void onRegionGenerated(int x, int z);
 

core/src/main/java/com/volmit/iris/core/pregenerator/cache/PregenCache.java

@@ -0,0 +1,70 @@
+package com.volmit.iris.core.pregenerator.cache;
+
+import com.volmit.iris.util.documentation.ChunkCoordinates;
+import com.volmit.iris.util.documentation.RegionCoordinates;
+
+import java.io.File;
+
+public interface PregenCache {
+    default boolean isThreadSafe() {
+        return false;
+    }
+
+    @ChunkCoordinates
+    boolean isChunkCached(int x, int z);
+
+    @RegionCoordinates
+    boolean isRegionCached(int x, int z);
+
+    @ChunkCoordinates
+    void cacheChunk(int x, int z);
+
+    @RegionCoordinates
+    void cacheRegion(int x, int z);
+
+    void write();
+
+    static PregenCache create(File directory) {
+        if (directory == null) return EMPTY;
+        return new PregenCacheImpl(directory);
+    }
+
+    default PregenCache sync() {
+        if (isThreadSafe()) return this;
+        return new SynchronizedCache(this);
+    }
+
+    PregenCache EMPTY = new PregenCache() {
+        @Override
+        public boolean isThreadSafe() {
+            return true;
+        }
+
+        @Override
+        public boolean isChunkCached(int x, int z) {
+            return false;
+        }
+
+        @Override
+        public boolean isRegionCached(int x, int z) {
+            return false;
+        }
+
+        @Override
+        public void cacheChunk(int x, int z) {
+
+        }
+
+        @Override
+        public void cacheRegion(int x, int z) {
+
+        }
+
+        @Override
+        public void write() {
+
+        }
+    };
+
+
+}

core/src/main/java/com/volmit/iris/core/pregenerator/cache/PregenCacheImpl.java

@@ -0,0 +1,215 @@
+package com.volmit.iris.core.pregenerator.cache;
+
+import com.github.benmanes.caffeine.cache.Caffeine;
+import com.github.benmanes.caffeine.cache.LoadingCache;
+import com.github.benmanes.caffeine.cache.RemovalCause;
+import com.volmit.iris.Iris;
+import com.volmit.iris.util.data.Varint;
+import com.volmit.iris.util.documentation.ChunkCoordinates;
+import com.volmit.iris.util.documentation.RegionCoordinates;
+import com.volmit.iris.util.parallel.HyperLock;
+import lombok.RequiredArgsConstructor;
+import net.jpountz.lz4.LZ4BlockInputStream;
+import net.jpountz.lz4.LZ4BlockOutputStream;
+import org.jetbrains.annotations.Nullable;
+
+import javax.annotation.concurrent.NotThreadSafe;
+import java.io.*;
+import java.util.concurrent.TimeUnit;
+import java.util.function.Predicate;
+
+@NotThreadSafe
+@RequiredArgsConstructor
+class PregenCacheImpl implements PregenCache {
+    private static final int SIZE = 32;
+    private final File directory;
+    private final HyperLock hyperLock = new HyperLock(SIZE * 2, true);
+    private final LoadingCache<Pos, Plate> cache = Caffeine.newBuilder()
+            .expireAfterAccess(10, TimeUnit.SECONDS)
+            .maximumSize(SIZE)
+            .removalListener(this::onRemoval)
+            .evictionListener(this::onRemoval)
+            .build(this::load);
+
+    @ChunkCoordinates
+    public boolean isChunkCached(int x, int z) {
+        var plate = cache.get(new Pos(x >> 10, z >> 10));
+        if (plate == null) return false;
+        return plate.isCached((x >> 5) & 31, (z >> 5) & 31, r -> r.isCached(x & 31, z & 31));
+    }
+
+    @RegionCoordinates
+    public boolean isRegionCached(int x, int z) {
+        var plate = cache.get(new Pos(x >> 5, z >> 5));
+        if (plate == null) return false;
+        return plate.isCached(x & 31, z & 31, Region::isCached);
+    }
+
+    @ChunkCoordinates
+    public void cacheChunk(int x, int z) {
+        var plate = cache.get(new Pos(x >> 10, z >> 10));
+        plate.cache((x >> 5) & 31, (z >> 5) & 31, r -> r.cache(x & 31, z & 31));
+    }
+
+    @RegionCoordinates
+    public void cacheRegion(int x, int z) {
+        var plate = cache.get(new Pos(x >> 5, z >> 5));
+        plate.cache(x & 31, z & 31, Region::cache);
+    }
+
+    public void write() {
+        cache.asMap().values().forEach(this::write);
+    }
+
+    private Plate load(Pos key) {
+        hyperLock.lock(key.x, key.z);
+        try {
+            File file = fileForPlate(key);
+            if (!file.exists()) return new Plate(key);
+            try (var in = new DataInputStream(new LZ4BlockInputStream(new FileInputStream(file)))) {
+                return new Plate(key, in);
+            } catch (IOException e){
+                Iris.error("Failed to read pregen cache " + file);
+                e.printStackTrace();
+                return new Plate(key);
+            }
+        } finally {
+            hyperLock.unlock(key.x, key.z);
+        }
+    }
+
+    private void write(Plate plate) {
+        hyperLock.lock(plate.pos.x, plate.pos.z);
+        try {
+            File file = fileForPlate(plate.pos);
+            try (var out = new DataOutputStream(new LZ4BlockOutputStream(new FileOutputStream(file)))) {
+                plate.write(out);
+            } catch (IOException e) {
+                Iris.error("Failed to write pregen cache " + file);
+                e.printStackTrace();
+            }
+        } finally {
+            hyperLock.unlock(plate.pos.x, plate.pos.z);
+        }
+    }
+
+    private void onRemoval(@Nullable Pos key, @Nullable Plate plate, RemovalCause cause) {
+        if (plate == null) return;
+        write(plate);
+    }
+
+    private File fileForPlate(Pos pos) {
+        if (!directory.exists() && !directory.mkdirs())
+            throw new IllegalStateException("Cannot create directory: " + directory.getAbsolutePath());
+        return new File(directory, "c." + pos.x + "." + pos.z + ".lz4b");
+    }
+
+    private static class Plate {
+        private final Pos pos;
+        private short count;
+        private Region[] regions;
+
+        public Plate(Pos pos) {
+            this.pos = pos;
+            count = 0;
+            regions = new Region[1024];
+        }
+
+        public Plate(Pos pos, DataInput in) throws IOException {
+            this.pos = pos;
+            count = (short) Varint.readSignedVarInt(in);
+            if (count == 1024) return;
+            regions = new Region[1024];
+            for (int i = 0; i < 1024; i++) {
+                if (in.readBoolean()) continue;
+                regions[i] = new Region(in);
+            }
+        }
+
+        public boolean isCached(int x, int z, Predicate<Region> predicate) {
+            if (count == 1024) return true;
+            Region region = regions[x * 32 + z];
+            if (region == null) return false;
+            return predicate.test(region);
+        }
+
+        public void cache(int x, int z, Predicate<Region> predicate) {
+            if (count == 1024) return;
+            Region region = regions[x * 32 + z];
+            if (region == null) regions[x * 32 + z] = region = new Region();
+            if (predicate.test(region)) count++;
+        }
+
+        public void write(DataOutput out) throws IOException {
+            Varint.writeSignedVarInt(count, out);
+            if (count == 1024) return;
+            for (Region region : regions) {
+                out.writeBoolean(region == null);
+                if (region == null) continue;
+                region.write(out);
+            }
+        }
+    }
+
+    private static class Region {
+        private short count;
+        private long[] words;
+
+        public Region() {
+            count = 0;
+            words = new long[64];
+        }
+
+        public Region(DataInput in) throws IOException {
+            count = (short) Varint.readSignedVarInt(in);
+            if (count == 1024) return;
+            words = new long[64];
+            for (int i = 0; i < 64; i++) {
+                words[i] = Varint.readUnsignedVarLong(in);
+            }
+        }
+
+        public boolean cache() {
+            if (count == 1024) return false;
+            count = 1024;
+            words = null;
+            return true;
+        }
+
+        public boolean cache(int x, int z) {
+            if (count == 1024) return false;
+
+            int i = x * 32 + z;
+            int w = i >> 6;
+            long b = 1L << (i & 63);
+
+            var cur = (words[w] & b) != 0;
+            if (cur) return false;
+
+            if (++count == 1024) {
+                words = null;
+                return true;
+            } else words[w] |= b;
+            return false;
+        }
+
+        public boolean isCached() {
+            return count == 1024;
+        }
+
+        public boolean isCached(int x, int z) {
+            int i = x * 32 + z;
+            return count == 1024 || (words[i >> 6] &  1L << (i & 63)) != 0;
+        }
+
+        public void write(DataOutput out) throws IOException {
+            Varint.writeSignedVarInt(count, out);
+            if (isCached()) return;
+            for (long word : words) {
+                Varint.writeUnsignedVarLong(word, out);
+            }
+        }
+    }
+
+    private record Pos(int x, int z) {}
+}

core/src/main/java/com/volmit/iris/core/pregenerator/cache/SynchronizedCache.java

@@ -0,0 +1,48 @@
+package com.volmit.iris.core.pregenerator.cache;
+
+import lombok.AllArgsConstructor;
+
+@AllArgsConstructor
+class SynchronizedCache implements PregenCache {
+    private final PregenCache cache;
+
+    @Override
+    public boolean isThreadSafe() {
+        return true;
+    }
+
+    @Override
+    public boolean isChunkCached(int x, int z) {
+        synchronized (cache) {
+            return cache.isChunkCached(x, z);
+        }
+    }
+
+    @Override
+    public boolean isRegionCached(int x, int z) {
+        synchronized (cache) {
+            return cache.isRegionCached(x, z);
+        }
+    }
+
+    @Override
+    public void cacheChunk(int x, int z) {
+        synchronized (cache) {
+            cache.cacheChunk(x, z);
+        }
+    }
+
+    @Override
+    public void cacheRegion(int x, int z) {
+        synchronized (cache) {
+            cache.cacheRegion(x, z);
+        }
+    }
+
+    @Override
+    public void write() {
+        synchronized (cache) {
+            cache.write();
+        }
+    }
+}

core/src/main/java/com/volmit/iris/core/pregenerator/methods/AsyncPregenMethod.java

@@ -32,26 +32,32 @@ import io.papermc.lib.PaperLib;
 import org.bukkit.Chunk;
 import org.bukkit.World;
 
-import java.util.ArrayList;
+import java.lang.reflect.InvocationTargetException;
 import java.util.Map;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
 import java.util.concurrent.Semaphore;
 import java.util.concurrent.atomic.AtomicInteger;
 
 public class AsyncPregenMethod implements PregeneratorMethod {
     private static final AtomicInteger THREAD_COUNT = new AtomicInteger();
     private final World world;
-    private final MultiBurst burst;
+    private final Executor executor;
     private final Semaphore semaphore;
+    private final int threads;
+    private final boolean urgent;
     private final Map<Chunk, Long> lastUse;
 
-    public AsyncPregenMethod(World world, int threads) {
+    public AsyncPregenMethod(World world, int unusedThreads) {
         if (!PaperLib.isPaper()) {
             throw new UnsupportedOperationException("Cannot use PaperAsync on non paper!");
         }
 
         this.world = world;
-        burst = new MultiBurst("Iris Async Pregen", Thread.MIN_PRIORITY);
-        semaphore = new Semaphore(256);
+        this.executor = IrisSettings.get().getPregen().isUseTicketQueue() ? new TicketExecutor() : new ServiceExecutor();
+        this.threads = IrisSettings.get().getPregen().getMaxConcurrency();
+        this.semaphore = new Semaphore(this.threads, true);
+        this.urgent = IrisSettings.get().getPregen().useHighPriority;
         this.lastUse = new KMap<>();
     }
 
@@ -63,13 +69,18 @@ public class AsyncPregenMethod implements PregeneratorMethod {
                     return;
                 }
 
-                for (Chunk i : new ArrayList<>(lastUse.keySet())) {
-                    Long lastUseTime = lastUse.get(i);
-                    if (!i.isLoaded() || (lastUseTime != null && M.ms() - lastUseTime >= 10000)) {
-                        i.unload();
-                        lastUse.remove(i);
+                long minTime = M.ms() - 10_000;
+                lastUse.entrySet().removeIf(i -> {
+                    final Chunk chunk = i.getKey();
+                    final Long lastUseTime = i.getValue();
+                    if (!chunk.isLoaded() || lastUseTime == null)
+                        return true;
+                    if (lastUseTime < minTime) {
+                        chunk.unload();
+                        return true;
                     }
-                }
+                    return false;
+                });
                 world.save();
             }).get();
         } catch (Throwable e) {
@@ -77,21 +88,6 @@ public class AsyncPregenMethod implements PregeneratorMethod {
         }
     }
 
-    private void completeChunk(int x, int z, PregenListener listener) {
-        try {
-            PaperLib.getChunkAtAsync(world, x, z, true).thenAccept((i) -> {
-                lastUse.put(i, M.ms());
-                listener.onChunkGenerated(x, z);
-                listener.onChunkCleaned(x, z);
-            }).get();
-        } catch (InterruptedException ignored) {
-        } catch (Throwable e) {
-            e.printStackTrace();
-        } finally {
-            semaphore.release();
-        }
-    }
-
     @Override
     public void init() {
         unloadAndSaveAllChunks();
@@ -105,9 +101,9 @@ public class AsyncPregenMethod implements PregeneratorMethod {
 
     @Override
     public void close() {
-        semaphore.acquireUninterruptibly(256);
+        semaphore.acquireUninterruptibly(threads);
         unloadAndSaveAllChunks();
-        burst.close();
+        executor.shutdown();
         resetWorkerThreads();
     }
 
@@ -134,7 +130,7 @@ public class AsyncPregenMethod implements PregeneratorMethod {
         } catch (InterruptedException e) {
             return;
         }
-        burst.complete(() -> completeChunk(x, z, listener));
+        executor.generate(x, z, listener);
     }
 
     @Override
@@ -146,23 +142,22 @@ public class AsyncPregenMethod implements PregeneratorMethod {
         return null;
     }
 
-
     public static void increaseWorkerThreads() {
         THREAD_COUNT.updateAndGet(i -> {
             if (i > 0) return 1;
+            var adjusted = IrisSettings.get().getConcurrency().getWorldGenThreads();
             try {
                 var field = Class.forName("ca.spottedleaf.moonrise.common.util.MoonriseCommon").getDeclaredField("WORKER_POOL");
                 var pool = field.get(null);
                 var threads = ((Thread[]) pool.getClass().getDeclaredMethod("getCoreThreads").invoke(pool)).length;
-                var adjusted = IrisSettings.get().getConcurrency().getWorldGenThreads();
                 if (threads >= adjusted) return 0;
 
                 pool.getClass().getDeclaredMethod("adjustThreadCount", int.class).invoke(pool, adjusted);
                 return threads;
-            } catch (ClassNotFoundException ignored) {
             } catch (Throwable e) {
-                Iris.error("Failed to increase worker threads");
-                e.printStackTrace();
+                Iris.warn("Failed to increase worker threads, if you are on paper or a fork of it please increase it manually to " + adjusted);
+                Iris.warn("For more information see https://docs.papermc.io/paper/reference/global-configuration#chunk_system_worker_threads");
+                if (e instanceof InvocationTargetException) e.printStackTrace();
             }
             return 0;
         });
@@ -177,7 +172,6 @@ public class AsyncPregenMethod implements PregeneratorMethod {
                 var method = pool.getClass().getDeclaredMethod("adjustThreadCount", int.class);
                 method.invoke(pool, i);
                 return 0;
-            } catch (ClassNotFoundException ignored) {
             } catch (Throwable e) {
                 Iris.error("Failed to reset worker threads");
                 e.printStackTrace();
@@ -185,4 +179,56 @@ public class AsyncPregenMethod implements PregeneratorMethod {
             return i;
         });
     }
+
+    private interface Executor {
+        void generate(int x, int z, PregenListener listener);
+        default void shutdown() {}
+    }
+
+    private class ServiceExecutor implements Executor {
+        private final ExecutorService service = IrisSettings.get().getPregen().isUseVirtualThreads() ?
+                Executors.newVirtualThreadPerTaskExecutor() :
+                new MultiBurst("Iris Async Pregen", Thread.MIN_PRIORITY);
+
+        public void generate(int x, int z, PregenListener listener) {
+            service.submit(() -> {
+                try {
+                    PaperLib.getChunkAtAsync(world, x, z, true, urgent).thenAccept((i) -> {
+                        listener.onChunkGenerated(x, z);
+                        listener.onChunkCleaned(x, z);
+                        if (i == null) return;
+                        lastUse.put(i, M.ms());
+                    }).get();
+                } catch (InterruptedException ignored) {
+                } catch (Throwable e) {
+                    e.printStackTrace();
+                } finally {
+                    semaphore.release();
+                }
+            });
+        }
+
+        @Override
+        public void shutdown() {
+            service.shutdown();
+        }
+    }
+
+    private class TicketExecutor implements Executor {
+        @Override
+        public void generate(int x, int z, PregenListener listener) {
+            PaperLib.getChunkAtAsync(world, x, z, true, urgent)
+                    .exceptionally(e -> {
+                        e.printStackTrace();
+                        return null;
+                    })
+                    .thenAccept(i -> {
+                        semaphore.release();
+                        listener.onChunkGenerated(x, z);
+                        listener.onChunkCleaned(x, z);
+                        if (i == null) return;
+                        lastUse.put(i, M.ms());
+                    });
+        }
+    }
 }

core/src/main/java/com/volmit/iris/core/pregenerator/methods/CachedPregenMethod.java

@@ -0,0 +1,86 @@
+package com.volmit.iris.core.pregenerator.methods;
+
+import com.volmit.iris.Iris;
+import com.volmit.iris.core.pregenerator.PregenListener;
+import com.volmit.iris.core.pregenerator.PregeneratorMethod;
+import com.volmit.iris.core.pregenerator.cache.PregenCache;
+import com.volmit.iris.core.service.GlobalCacheSVC;
+import com.volmit.iris.util.mantle.Mantle;
+import lombok.AllArgsConstructor;
+
+@AllArgsConstructor
+public class CachedPregenMethod implements PregeneratorMethod {
+    private final PregeneratorMethod method;
+    private final PregenCache cache;
+
+    public CachedPregenMethod(PregeneratorMethod method, String worldName) {
+        this.method = method;
+        var cache = Iris.service(GlobalCacheSVC.class).get(worldName);
+        if (cache == null) {
+            Iris.debug("Could not find existing cache for " + worldName  + " creating fallback");
+            cache = GlobalCacheSVC.createDefault(worldName);
+        }
+        this.cache = cache;
+    }
+
+    @Override
+    public void init() {
+        method.init();
+    }
+
+    @Override
+    public void close() {
+        method.close();
+        cache.write();
+    }
+
+    @Override
+    public void save() {
+        method.save();
+        cache.write();
+    }
+
+    @Override
+    public boolean supportsRegions(int x, int z, PregenListener listener) {
+        return cache.isRegionCached(x, z) || method.supportsRegions(x, z, listener);
+    }
+
+    @Override
+    public String getMethod(int x, int z) {
+        return method.getMethod(x, z);
+    }
+
+    @Override
+    public void generateRegion(int x, int z, PregenListener listener) {
+        if (cache.isRegionCached(x, z)) {
+            listener.onRegionGenerated(x, z);
+
+            int rX = x << 5, rZ = z << 5;
+            for (int cX = 0; cX < 32; cX++) {
+                for (int cZ = 0; cZ < 32; cZ++) {
+                    listener.onChunkGenerated(rX + cX, rZ + cZ, true);
+                    listener.onChunkCleaned(rX + cX, rZ + cZ);
+                }
+            }
+            return;
+        }
+        method.generateRegion(x, z, listener);
+        cache.cacheRegion(x, z);
+    }
+
+    @Override
+    public void generateChunk(int x, int z, PregenListener listener) {
+        if (cache.isChunkCached(x, z)) {
+            listener.onChunkGenerated(x, z, true);
+            listener.onChunkCleaned(x, z);
+            return;
+        }
+        method.generateChunk(x, z, listener);
+        cache.cacheChunk(x, z);
+    }
+
+    @Override
+    public Mantle getMantle() {
+        return method.getMantle();
+    }
+}

core/src/main/java/com/volmit/iris/core/safeguard/ServerBootSFG.java

@@ -160,13 +160,9 @@ public class ServerBootSFG {
     }
 
     public static boolean enoughDiskSpace() {
-        File freeSpace = new File(Bukkit.getWorldContainer() + ".");
+        File freeSpace = Bukkit.getWorldContainer();
         double gigabytes = freeSpace.getFreeSpace() / (1024.0 * 1024.0 * 1024.0);
-        if (gigabytes > 3){
-            return true;
-        } else {
-            return false;
-        }
+        return gigabytes > 3;
     }
 
     private static boolean checkJavac(String path) {

core/src/main/java/com/volmit/iris/core/service/GlobalCacheSVC.java

@@ -0,0 +1,104 @@
+package com.volmit.iris.core.service;
+
+import com.github.benmanes.caffeine.cache.Cache;
+import com.github.benmanes.caffeine.cache.Caffeine;
+import com.volmit.iris.core.IrisSettings;
+import com.volmit.iris.core.pregenerator.cache.PregenCache;
+import com.volmit.iris.util.collection.KMap;
+import com.volmit.iris.util.plugin.IrisService;
+import lombok.NonNull;
+import org.bukkit.Bukkit;
+import org.bukkit.World;
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.EventPriority;
+import org.bukkit.event.world.ChunkLoadEvent;
+import org.bukkit.event.world.WorldInitEvent;
+import org.bukkit.event.world.WorldUnloadEvent;
+import org.jetbrains.annotations.Nullable;
+
+import java.io.File;
+import java.util.function.Function;
+
+public class GlobalCacheSVC implements IrisService {
+    private static final Cache<String, PregenCache> REFERENCE_CACHE = Caffeine.newBuilder().weakValues().build();
+    private final KMap<String, PregenCache> globalCache = new KMap<>();
+    private transient boolean lastState;
+
+    @Override
+    public void onEnable() {
+        lastState = !IrisSettings.get().getWorld().isGlobalPregenCache();
+        if (lastState) return;
+        Bukkit.getWorlds().forEach(this::createCache);
+    }
+
+    @Override
+    public void onDisable() {
+        globalCache.values().forEach(PregenCache::write);
+    }
+
+    @Nullable
+    public PregenCache get(@NonNull World world) {
+        return globalCache.get(world.getName());
+    }
+
+    @Nullable
+    public PregenCache get(@NonNull String world) {
+        return globalCache.get(world);
+    }
+
+    @EventHandler(priority = EventPriority.MONITOR)
+    public void on(WorldInitEvent event) {
+        if (isDisabled()) return;
+        createCache(event.getWorld());
+    }
+
+    @EventHandler(priority = EventPriority.MONITOR)
+    public void on(WorldUnloadEvent event) {
+        var cache = globalCache.remove(event.getWorld().getName());
+        if (cache == null) return;
+        cache.write();
+    }
+
+    @EventHandler(priority = EventPriority.MONITOR)
+    public void on(ChunkLoadEvent event) {
+        var cache = get(event.getWorld());
+        if (cache == null) return;
+        cache.cacheChunk(event.getChunk().getX(), event.getChunk().getZ());
+    }
+
+    private void createCache(World world) {
+        globalCache.computeIfAbsent(world.getName(), GlobalCacheSVC::createDefault);
+    }
+
+    private boolean isDisabled() {
+        boolean conf = IrisSettings.get().getWorld().isGlobalPregenCache();
+        if (lastState != conf)
+            return lastState;
+
+        if (conf) {
+            Bukkit.getWorlds().forEach(this::createCache);
+        } else {
+            globalCache.values().removeIf(cache -> {
+                cache.write();
+                return true;
+            });
+        }
+
+        return lastState = !conf;
+    }
+
+
+    @NonNull
+    public static PregenCache createCache(@NonNull String worldName, @NonNull Function<String, PregenCache> provider) {
+        return REFERENCE_CACHE.get(worldName, provider);
+    }
+
+    @NonNull
+    public static PregenCache createDefault(@NonNull String worldName) {
+        return createCache(worldName, GlobalCacheSVC::createDefault0);
+    }
+
+    private static PregenCache createDefault0(String worldName) {
+        return PregenCache.create(new File(Bukkit.getWorldContainer(), String.join(File.separator, worldName, "iris", "pregen"))).sync();
+    }
+}

core/src/main/java/com/volmit/iris/core/service/IrisEngineSVC.java

@@ -1,317 +1,242 @@
 package com.volmit.iris.core.service;
 
+import com.google.common.util.concurrent.AtomicDouble;
 import com.volmit.iris.Iris;
 import com.volmit.iris.core.IrisSettings;
+import com.volmit.iris.core.loader.IrisData;
 import com.volmit.iris.core.tools.IrisToolbelt;
 import com.volmit.iris.engine.framework.Engine;
 import com.volmit.iris.engine.platform.PlatformChunkGenerator;
-import com.volmit.iris.util.collection.KList;
 import com.volmit.iris.util.collection.KMap;
 import com.volmit.iris.util.format.C;
 import com.volmit.iris.util.format.Form;
-import com.volmit.iris.util.mantle.TectonicPlate;
-import com.volmit.iris.util.misc.getHardware;
+import com.volmit.iris.util.math.RNG;
 import com.volmit.iris.util.plugin.IrisService;
-import com.volmit.iris.util.scheduling.ChronoLatch;
+import com.volmit.iris.util.plugin.VolmitSender;
 import com.volmit.iris.util.scheduling.Looper;
-import com.volmit.iris.util.scheduling.PrecisionStopwatch;
+import lombok.Synchronized;
 import org.bukkit.Bukkit;
 import org.bukkit.World;
 import org.bukkit.event.EventHandler;
-import org.bukkit.event.server.PluginDisableEvent;
-import org.bukkit.event.server.ServerLoadEvent;
 import org.bukkit.event.world.WorldLoadEvent;
 import org.bukkit.event.world.WorldUnloadEvent;
-import org.checkerframework.checker.units.qual.A;
+import org.jetbrains.annotations.Nullable;
 
-import java.util.*;
-import java.util.concurrent.atomic.AtomicBoolean;
+import java.util.concurrent.*;
 import java.util.concurrent.atomic.AtomicInteger;
 import java.util.concurrent.atomic.AtomicLong;
-import java.util.concurrent.locks.ReentrantLock;
-import java.util.function.Supplier;
 
 public class IrisEngineSVC implements IrisService {
-    public static IrisEngineSVC instance;
-    public boolean isServerShuttingDown = false;
-    public boolean isServerLoaded = false;
-    private static final AtomicInteger tectonicLimit = new AtomicInteger(30);
-    private ReentrantLock lastUseLock;
-    private KMap<World, Long> lastUse;
-    private List<World> IrisWorlds;
-    private Looper cacheTicker;
-    private Looper trimTicker;
-    private Looper unloadTicker;
+    private final AtomicInteger tectonicLimit = new AtomicInteger(30);
+    private final AtomicInteger tectonicPlates = new AtomicInteger();
+    private final AtomicInteger queuedTectonicPlates = new AtomicInteger();
+    private final AtomicInteger trimmerAlive = new AtomicInteger();
+    private final AtomicInteger unloaderAlive = new AtomicInteger();
+    private final AtomicInteger totalWorlds = new AtomicInteger();
+    private final AtomicDouble maxIdleDuration = new AtomicDouble();
+    private final AtomicDouble minIdleDuration = new AtomicDouble();
+    private final AtomicLong loadedChunks = new AtomicLong();
+    private final KMap<World, Registered> worlds = new KMap<>();
+    private ScheduledExecutorService service;
     private Looper updateTicker;
-    private PrecisionStopwatch trimAlive;
-    private PrecisionStopwatch unloadAlive;
-    public PrecisionStopwatch trimActiveAlive;
-    public PrecisionStopwatch unloadActiveAlive;
-    private AtomicInteger TotalTectonicPlates;
-    private AtomicInteger TotalQueuedTectonicPlates;
-    private AtomicInteger TotalNotQueuedTectonicPlates;
-    private AtomicBoolean IsUnloadAlive;
-    private AtomicBoolean IsTrimAlive;
-    ChronoLatch cl;
-
-    public List<World> corruptedIrisWorlds = new ArrayList<>();
 
     @Override
     public void onEnable() {
-        this.cl = new ChronoLatch(5000);
-        lastUse = new KMap<>();
-        lastUseLock = new ReentrantLock();
-        IrisWorlds = new ArrayList<>();
-        IsUnloadAlive = new AtomicBoolean(true);
-        IsTrimAlive = new AtomicBoolean(true);
-        trimActiveAlive = new PrecisionStopwatch();
-        unloadActiveAlive = new PrecisionStopwatch();
-        trimAlive = new PrecisionStopwatch();
-        unloadAlive = new PrecisionStopwatch();
-        TotalTectonicPlates = new AtomicInteger();
-        TotalQueuedTectonicPlates = new AtomicInteger();
-        TotalNotQueuedTectonicPlates = new AtomicInteger();
-        tectonicLimit.set(2);
-        long t = getHardware.getProcessMemory();
-        while (t > 200) {
-            tectonicLimit.getAndAdd(1);
-            t = t - 200;
-        }
-        this.setup();
-        this.TrimLogic();
-        this.UnloadLogic();
-
-        trimAlive.begin();
-        unloadAlive.begin();
-        trimActiveAlive.begin();
-        unloadActiveAlive.begin();
-
-        updateTicker.start();
-        cacheTicker.start();
-        //trimTicker.start();
-        //unloadTicker.start();
-        instance = this;
-
+        var settings = IrisSettings.get().getPerformance();
+        var engine = settings.getEngineSVC();
+        service = Executors.newScheduledThreadPool(0,
+                (engine.isUseVirtualThreads()
+                        ? Thread.ofVirtual()
+                        : Thread.ofPlatform().priority(engine.getPriority()))
+                        .name("Iris EngineSVC-", 0)
+                        .factory());
+        tectonicLimit.set(settings.getTectonicPlateSize());
+        Bukkit.getWorlds().forEach(this::add);
+        setup();
     }
 
-    public void engineStatus() {
-        boolean trimAlive = trimTicker.isAlive();
-        boolean unloadAlive = unloadTicker.isAlive();
-        Iris.info("Status:");
-        Iris.info("- Trim: " + trimAlive);
-        Iris.info("- Unload: " + unloadAlive);
-
+    @Override
+    public void onDisable() {
+        service.shutdown();
+        updateTicker.interrupt();
+        worlds.keySet().forEach(this::remove);
+        worlds.clear();
     }
 
-    public static int getTectonicLimit() {
-        return tectonicLimit.get();
+    public void engineStatus(VolmitSender sender) {
+        sender.sendMessage(C.DARK_PURPLE + "-------------------------");
+        sender.sendMessage(C.DARK_PURPLE + "Status:");
+        sender.sendMessage(C.DARK_PURPLE + "- Service: " + C.LIGHT_PURPLE + (service.isShutdown() ? "Shutdown" : "Running"));
+        sender.sendMessage(C.DARK_PURPLE + "- Updater: " + C.LIGHT_PURPLE + (updateTicker.isAlive() ? "Running" : "Stopped"));
+        sender.sendMessage(C.DARK_PURPLE + "- Trimmers: " + C.LIGHT_PURPLE + trimmerAlive.get());
+        sender.sendMessage(C.DARK_PURPLE + "- Unloaders: " + C.LIGHT_PURPLE + unloaderAlive.get());
+        sender.sendMessage(C.DARK_PURPLE + "Tectonic Plates:");
+        sender.sendMessage(C.DARK_PURPLE + "- Limit: " + C.LIGHT_PURPLE + tectonicLimit.get());
+        sender.sendMessage(C.DARK_PURPLE + "- Total: " + C.LIGHT_PURPLE + tectonicPlates.get());
+        sender.sendMessage(C.DARK_PURPLE + "- Queued: " + C.LIGHT_PURPLE + queuedTectonicPlates.get());
+        sender.sendMessage(C.DARK_PURPLE + "- Max Idle Duration: " + C.LIGHT_PURPLE + Form.duration(maxIdleDuration.get(), 2));
+        sender.sendMessage(C.DARK_PURPLE + "- Min Idle Duration: " + C.LIGHT_PURPLE + Form.duration(minIdleDuration.get(), 2));
+        sender.sendMessage(C.DARK_PURPLE + "Other:");
+        sender.sendMessage(C.DARK_PURPLE + "- Iris Worlds: " + C.LIGHT_PURPLE + totalWorlds.get());
+        sender.sendMessage(C.DARK_PURPLE + "- Loaded Chunks: " + C.LIGHT_PURPLE + loadedChunks.get());
+        sender.sendMessage(C.DARK_PURPLE + "- Cache Size: " + C.LIGHT_PURPLE + Form.f(IrisData.cacheSize()));
+        sender.sendMessage(C.DARK_PURPLE + "-------------------------");
     }
 
     @EventHandler
     public void onWorldUnload(WorldUnloadEvent event) {
-        updateWorlds();
+        remove(event.getWorld());
     }
 
     @EventHandler
     public void onWorldLoad(WorldLoadEvent event) {
-        updateWorlds();
+        add(event.getWorld());
     }
 
-    @EventHandler
-    public void onServerBoot(ServerLoadEvent event) {
-        isServerLoaded = true;
+    private void remove(World world) {
+        var entry = worlds.remove(world);
+        if (entry == null) return;
+        entry.close();
     }
 
-    @EventHandler
-    public void onPluginDisable(PluginDisableEvent event) {
-        if (event.getPlugin().equals(Iris.instance)) {
-            isServerShuttingDown = true;
-        }
+    private void add(World world) {
+        var access = IrisToolbelt.access(world);
+        if (access == null) return;
+        worlds.put(world, new Registered(world.getName(), access));
     }
 
-    public void updateWorlds() {
-        for (World world : Bukkit.getWorlds()) {
-            try {
-                if (IrisToolbelt.access(world).getEngine() != null) {
-                    IrisWorlds.add(world);
-                }
-            } catch (Exception e) {
-                // no
-            }
-        }
-    }
-
-    private void setup() {
-        cacheTicker = new Looper() {
-            @Override
-            protected long loop() {
-                long now = System.currentTimeMillis();
-                lastUseLock.lock();
-                try {
-                    for (World key : new ArrayList<>(lastUse.keySet())) {
-                        Long last = lastUse.get(key);
-                        if (last == null)
-                            continue;
-                        if (now - last > 60000) {
-                            lastUse.remove(key);
-                        }
-                    }
-                } finally {
-                    lastUseLock.unlock();
-                }
-                return 1000;
-            }
-        };
+    private synchronized void setup() {
+        if (updateTicker != null && updateTicker.isAlive())
+            return;
 
         updateTicker = new Looper() {
             @Override
             protected long loop() {
                 try {
-                    TotalQueuedTectonicPlates.set(0);
-                    TotalNotQueuedTectonicPlates.set(0);
-                    TotalTectonicPlates.set(0);
-                    for (World world : IrisWorlds) {
-                        Engine engine = Objects.requireNonNull(IrisToolbelt.access(world)).getEngine();
-                        TotalQueuedTectonicPlates.addAndGet((int) engine.getMantle().getToUnload());
-                        TotalNotQueuedTectonicPlates.addAndGet((int) engine.getMantle().getNotQueuedLoadedRegions());
-                        TotalTectonicPlates.addAndGet(engine.getMantle().getLoadedRegionCount());
-                    }
-                    if (!isServerShuttingDown && isServerLoaded) {
-                        if (!trimTicker.isAlive()) {
-                            Iris.info(C.RED + "TrimTicker found dead! Booting it up!");
-                            try {
-                                TrimLogic();
-                            } catch (Exception e) {
-                                Iris.error("What happened?");
-                                e.printStackTrace();
-                            }
-                        }
+                    queuedTectonicPlates.set(0);
+                    tectonicPlates.set(0);
+                    loadedChunks.set(0);
+                    unloaderAlive.set(0);
+                    trimmerAlive.set(0);
+                    totalWorlds.set(0);
 
-                        if (!unloadTicker.isAlive()) {
-                            Iris.info(C.RED + "UnloadTicker found dead! Booting it up!");
-                            try {
-                               UnloadLogic();
-                            } catch (Exception e) {
-                                Iris.error("What happened?");
-                                e.printStackTrace();
-                            }
-                        }
-                    }
+                    double maxDuration = Long.MIN_VALUE;
+                    double minDuration = Long.MAX_VALUE;
+                    for (var entry : worlds.entrySet()) {
+                        var registered = entry.getValue();
+                        if (registered.closed) continue;
 
-                } catch (Exception e) {
-                    return -1;
+                        totalWorlds.incrementAndGet();
+                        unloaderAlive.addAndGet(registered.unloaderAlive() ? 1 : 0);
+                        trimmerAlive.addAndGet(registered.trimmerAlive() ? 1 : 0);
+
+                        var engine = registered.getEngine();
+                        if (engine == null) continue;
+
+                        queuedTectonicPlates.addAndGet((int) engine.getMantle().getUnloadRegionCount());
+                        tectonicPlates.addAndGet(engine.getMantle().getLoadedRegionCount());
+                        loadedChunks.addAndGet(entry.getKey().getLoadedChunks().length);
+
+                        double duration = engine.getMantle().getAdjustedIdleDuration();
+                        if (duration > maxDuration) maxDuration = duration;
+                        if (duration < minDuration) minDuration = duration;
+                    }
+                    maxIdleDuration.set(maxDuration);
+                    minIdleDuration.set(minDuration);
+
+                    worlds.values().forEach(Registered::update);
+                } catch (Throwable e) {
+                    e.printStackTrace();
                 }
                 return 1000;
             }
         };
+        updateTicker.start();
     }
-    public void TrimLogic() {
-        if (trimTicker == null || !trimTicker.isAlive()) {
-            trimTicker = new Looper() {
-                private final Supplier<Engine> supplier = createSupplier();
 
-                @Override
-                protected long loop() {
-                    long start = System.currentTimeMillis();
-                    trimAlive.reset();
+    private final class Registered {
+        private final String name;
+        private final PlatformChunkGenerator access;
+        private transient ScheduledFuture<?> trimmer;
+        private transient ScheduledFuture<?> unloader;
+        private transient boolean closed;
+
+        private Registered(String name, PlatformChunkGenerator access) {
+            this.name = name;
+            this.access = access;
+            update();
+        }
+
+        private boolean unloaderAlive() {
+            return unloader != null && !unloader.isDone() && !unloader.isCancelled();
+        }
+
+        private boolean trimmerAlive() {
+            return trimmer != null && !trimmer.isDone() && !trimmer.isCancelled();
+        }
+
+        @Synchronized
+        private void update() {
+            if (closed || service == null || service.isShutdown())
+                return;
+
+            if (trimmer == null || trimmer.isDone() || trimmer.isCancelled()) {
+                trimmer = service.scheduleAtFixedRate(() -> {
+                    Engine engine = getEngine();
+                    if (engine == null || !engine.getMantle().getMantle().shouldReduce(engine))
+                        return;
+
                     try {
-                        Engine engine = supplier.get();
-                        if (engine != null) {
-                            engine.getMantle().trim(tectonicLimit.get() / lastUse.size());
+                        engine.getMantle().trim(tectonicLimit.get() / worlds.size());
+                    } catch (Throwable e) {
+                        Iris.reportError(e);
+                        Iris.error("EngineSVC: Failed to trim for " + name);
+                        e.printStackTrace();
+                    }
+                }, RNG.r.nextInt(1000), 1000, TimeUnit.MILLISECONDS);
+            }
+
+            if (unloader == null || unloader.isDone() || unloader.isCancelled()) {
+                unloader = service.scheduleAtFixedRate(() -> {
+                    Engine engine = getEngine();
+                    if (engine == null || !engine.getMantle().getMantle().shouldReduce(engine))
+                        return;
+
+                    try {
+                        long unloadStart = System.currentTimeMillis();
+                        int count = engine.getMantle().unloadTectonicPlate(tectonicLimit.get() / worlds.size());
+                        if (count > 0) {
+                            Iris.debug(C.GOLD + "Unloaded " + C.YELLOW + count + " TectonicPlates in " + C.RED + Form.duration(System.currentTimeMillis() - unloadStart, 2));
                         }
                     } catch (Throwable e) {
                         Iris.reportError(e);
-                        Iris.info(C.RED + "EngineSVC: Failed to trim.");
+                        Iris.error("EngineSVC: Failed to unload for " + name);
                         e.printStackTrace();
-                        return -1;
                     }
-
-                    int size = lastUse.size();
-                    long time = (size > 0 ? 1000 / size : 1000) - (System.currentTimeMillis() - start);
-                    if (time <= 0)
-                        return 0;
-                    return time;
-                }
-            };
-            trimTicker.start();
-        }
-    }
-    public void UnloadLogic() {
-        if (unloadTicker == null || !unloadTicker.isAlive()) {
-            unloadTicker = new Looper() {
-                private final Supplier<Engine> supplier = createSupplier();
-
-                @Override
-                protected long loop() {
-                    long start = System.currentTimeMillis();
-                    unloadAlive.reset();
-                    try {
-                        Engine engine = supplier.get();
-                        if (engine != null) {
-                            long unloadStart = System.currentTimeMillis();
-                            int count = engine.getMantle().unloadTectonicPlate(tectonicLimit.get() / lastUse.size());
-                            if (count > 0) {
-                                Iris.debug(C.GOLD + "Unloaded " + C.YELLOW + count + " TectonicPlates in " + C.RED + Form.duration(System.currentTimeMillis() - unloadStart, 2));
-                            }
-                        }
-                    } catch (Throwable e) {
-                        Iris.reportError(e);
-                        Iris.info(C.RED + "EngineSVC: Failed to unload.");
-                        e.printStackTrace();
-                        return -1;
-                    }
-
-                    int size = lastUse.size();
-                    long time = (size > 0 ? 1000 / size : 1000) - (System.currentTimeMillis() - start);
-                    if (time <= 0)
-                        return 0;
-                    return time;
-                }
-            };
-            unloadTicker.start();
-        }
-    }
-
-    private Supplier<Engine> createSupplier() {
-        AtomicInteger i = new AtomicInteger();
-        return () -> {
-            List<World> worlds = Bukkit.getWorlds();
-            if (i.get() >= worlds.size()) {
-                i.set(0);
+                }, RNG.r.nextInt(1000), 1000, TimeUnit.MILLISECONDS);
             }
-            try {
-                for (int j = 0; j < worlds.size(); j++) {
-                    World world = worlds.get(i.getAndIncrement());
-                    PlatformChunkGenerator generator = IrisToolbelt.access(world);
-                    if (i.get() >= worlds.size()) {
-                        i.set(0);
-                    }
+        }
 
-                    if (generator != null) {
-                        Engine engine = generator.getEngine();
-                        boolean closed = engine.getMantle().getData().isClosed();
-                        if (engine != null && !engine.isStudio() && !closed) {
-                            lastUseLock.lock();
-                            lastUse.put(world, System.currentTimeMillis());
-                            lastUseLock.unlock();
-                            return engine;
-                        }
-                    }
-                }
-            } catch (Throwable e) {
-                Iris.info(C.RED + "EngineSVC: Failed to create supplier.");
-                e.printStackTrace();
-                Iris.reportError(e);
+        @Synchronized
+        private void close() {
+            if (closed) return;
+            closed = true;
+
+            if (trimmer != null) {
+                trimmer.cancel(false);
+                trimmer = null;
             }
-            return null;
-        };
-    }
 
-    @Override
-    public void onDisable() {
-        cacheTicker.interrupt();
-        trimTicker.interrupt();
-        unloadTicker.interrupt();
-        lastUse.clear();
+            if (unloader != null) {
+                unloader.cancel(false);
+                unloader = null;
+            }
+        }
+
+        @Nullable
+        private Engine getEngine() {
+            if (closed) return null;
+            return access.getEngine();
+        }
     }
 }

core/src/main/java/com/volmit/iris/core/tools/IrisBenchmarking.java

@@ -1,625 +0,0 @@
-package com.volmit.iris.core.tools;
-
-import com.volmit.iris.Iris;
-import com.volmit.iris.util.format.C;
-import oshi.SystemInfo;
-import oshi.hardware.CentralProcessor;
-import oshi.hardware.GlobalMemory;
-import oshi.hardware.HWDiskStore;
-import oshi.software.os.OperatingSystem;
-
-import java.io.*;
-import java.lang.management.ManagementFactory;
-import java.lang.management.MemoryMXBean;
-import java.lang.management.MemoryUsage;
-import java.security.SecureRandom;
-import java.util.ArrayList;
-import java.util.Arrays;
-import java.util.Base64;
-import java.util.List;
-import java.util.concurrent.atomic.AtomicReference;
-import java.util.stream.IntStream;
-import java.util.zip.Deflater;
-import java.util.concurrent.CompletableFuture;
-import java.util.concurrent.ExecutionException;
-import java.io.BufferedReader;
-import java.io.IOException;
-import java.io.InputStreamReader;
-
-import static com.google.common.math.LongMath.isPrime;
-import static com.volmit.iris.util.misc.getHardware.getCPUModel;
-public class IrisBenchmarking {
-    static String ServerOS;
-    static String filePath = "benchmark.dat";
-    static double avgWriteSpeedMBps;
-    static double avgReadSpeedMBps;
-    static double highestWriteSpeedMBps;
-    static double highestReadSpeedMBps;
-    static double lowestWriteSpeedMBps;
-    static double lowestReadSpeedMBps;
-    static double calculateIntegerMath;
-    static double calculateFloatingPoint;
-    static double calculatePrimeNumbers;
-    static double calculateStringSorting;
-    static double calculateDataEncryption;
-    static double calculateDataCompression;
-    static String currentRunning = "None";
-    static int BenchmarksCompleted = 0;
-    static int BenchmarksTotal = 7;
-    static int totalTasks = 10;
-    static int currentTasks = 0;
-    static double WindowsCPUCompression;
-    static double WindowsCPUEncryption;
-    static double WindowsCPUCSHA1;
-    static double elapsedTimeNs;
-    static boolean Winsat = false;
-    static boolean WindowsDiskSpeed = false;
-    public static boolean inProgress = false;
-    static double startTime;
-    // Good enough for now. . .
-
-    public static void runBenchmark() throws InterruptedException {
-        inProgress = true;
-        getServerOS();
-        deleteTestFile(filePath);
-        AtomicReference<Double> doneCalculateDiskSpeed = new AtomicReference<>((double) 0);
-        startBenchmarkTimer();
-        Iris.info("Benchmark Started!");
-        Iris.warn("Although it may seem momentarily paused, it's actively processing.");
-        BenchmarksCompleted = 0;
-
-        CompletableFuture<Void> future = CompletableFuture.runAsync(() -> {
-            currentRunning = "calculateDiskSpeed";
-            progressBar();
-            if (ServerOS.contains("Windows") && isRunningAsAdmin()) {
-                WindowsDiskSpeed = true;
-                WindowsDiskSpeedTest();
-            } else {
-                warningFallback();
-                try {
-                    Thread.sleep(10);
-                } catch (InterruptedException e) {
-                    throw new RuntimeException(e);
-                }
-                doneCalculateDiskSpeed.set(roundToTwoDecimalPlaces(calculateDiskSpeed()));
-                BenchmarksCompleted++;
-            }
-
-
-        }).thenRun(() -> {
-            currentRunning = "WindowsCpuSpeedTest";
-            progressBar();
-            if (ServerOS.contains("Windows") && isRunningAsAdmin()) {
-                Winsat = true;
-                WindowsCpuSpeedTest();
-            } else {
-                Iris.info("Skipping:" + C.BLUE + " Windows System Assessment Tool Benchmarks");
-                if (!ServerOS.contains("Windows")) {
-                    Iris.info("Required Software:" + C.BLUE + " Windows");
-                    BenchmarksTotal = 6;
-                }
-                if (!isRunningAsAdmin()) {
-                    Iris.info(C.RED + "ERROR: " + C.DARK_RED + "Elevated privileges missing");
-                    BenchmarksTotal = 6;
-                }
-            }
-
-        }).thenRun(() -> {
-            currentRunning = "calculateIntegerMath";
-            progressBar();
-            calculateIntegerMath = roundToTwoDecimalPlaces(calculateIntegerMath());
-            BenchmarksCompleted++;
-        }).thenRun(() -> {
-            currentRunning = "calculateFloatingPoint";
-            progressBar();
-            calculateFloatingPoint = roundToTwoDecimalPlaces(calculateFloatingPoint());
-            BenchmarksCompleted++;
-        }).thenRun(() -> {
-            currentRunning = "calculateStringSorting";
-            progressBar();
-            calculateStringSorting = roundToTwoDecimalPlaces(calculateStringSorting());
-            BenchmarksCompleted++;
-        }).thenRun(() -> {
-            currentRunning = "calculatePrimeNumbers";
-            progressBar();
-            calculatePrimeNumbers = roundToTwoDecimalPlaces(calculatePrimeNumbers());
-            BenchmarksCompleted++;
-        }).thenRun(() -> {
-            currentRunning = "calculateDataEncryption";
-            progressBar();
-            calculateDataEncryption = roundToTwoDecimalPlaces(calculateDataEncryption());
-            BenchmarksCompleted++;
-        }).thenRun(() -> {
-            currentRunning = "calculateDataCompression";
-            progressBar();
-            calculateDataCompression = roundToTwoDecimalPlaces(calculateDataCompression());
-            BenchmarksCompleted++;
-        }).thenRun(() -> {
-            elapsedTimeNs = stopBenchmarkTimer();
-            results();
-            inProgress = false;
-        });
-
-        try {
-            future.get();
-        } catch (InterruptedException | ExecutionException e) {
-            e.printStackTrace();
-        }
-    }
-
-    public static void progressBar() {
-        Iris.info("-----------------------------------------------------");
-        Iris.info("Currently Running: " + C.BLUE + currentRunning);
-        // Iris.info("Tasks: " + "Current Tasks: " + C.BLUE + currentTasks + C.WHITE + " / " + "Total Tasks: " + C.BLUE + totalTasks);
-        Iris.info("Benchmarks Completed: " + C.BLUE + BenchmarksCompleted + C.WHITE + " / " + "Total: " + C.BLUE + BenchmarksTotal);
-        Iris.info("-----------------------------------------------------");
-    }
-
-    public static void results() {
-
-        SystemInfo systemInfo = new SystemInfo();
-        GlobalMemory globalMemory = systemInfo.getHardware().getMemory();
-        long totalMemoryMB = globalMemory.getTotal() / (1024 * 1024);
-        long availableMemoryMB = globalMemory.getAvailable() / (1024 * 1024);
-        long totalPageSize = globalMemory.getPageSize() / (1024 * 1024);
-        long usedMemoryMB = totalMemoryMB - availableMemoryMB;
-        MemoryMXBean memoryMXBean = ManagementFactory.getMemoryMXBean();
-
-        Iris.info("OS: " + ServerOS);
-        if (!isRunningAsAdmin() || !ServerOS.contains("Windows")) {
-            Iris.info(C.GOLD + "For the full results use Windows + Admin Rights..");
-        }
-        Iris.info("CPU Model: " + getCPUModel());
-        Iris.info("CPU Score: " + "WIP");
-        Iris.info("- Integer Math: " + calculateIntegerMath + " MOps/Sec");
-        Iris.info("- Floating Point Math: " + calculateFloatingPoint + " MOps/Sec");
-        Iris.info("- Find Prime Numbers: " + calculatePrimeNumbers + " Primes/Sec");
-        Iris.info("- Random String Sorting: " + calculateStringSorting + " Thousand Strings/Sec");
-        Iris.info("- Data Encryption: " + formatDouble(calculateDataEncryption) + " MBytes/Sec");
-        Iris.info("- Data Compression: " + formatDouble(calculateDataCompression) + " MBytes/Sec");
-
-        if (WindowsDiskSpeed) {
-            //Iris.info("Disk Model: " + getDiskModel());
-            Iris.info(C.BLUE + "- Running with Windows System Assessment Tool");
-            Iris.info("- Sequential 64.0 Write: " + C.BLUE + formatDouble(avgWriteSpeedMBps) + " Mbps");
-            Iris.info("- Sequential 64.0 Read: " + C.BLUE + formatDouble(avgReadSpeedMBps) + " Mbps");
-        } else {
-           // Iris.info("Disk Model: " + getDiskModel());
-            Iris.info(C.GREEN + "- Running in Native Mode");
-            Iris.info("- Average Write Speed: " + C.GREEN + formatDouble(avgWriteSpeedMBps) + " Mbps");
-            Iris.info("- Average Read Speed: " + C.GREEN + formatDouble(avgReadSpeedMBps) + " Mbps");
-            Iris.info("- Highest Write Speed: " + formatDouble(highestWriteSpeedMBps) + " Mbps");
-            Iris.info("- Highest Read Speed: " + formatDouble(highestReadSpeedMBps) + " Mbps");
-            Iris.info("- Lowest Write Speed: " + formatDouble(lowestWriteSpeedMBps) + " Mbps");
-            Iris.info("- Lowest Read Speed: " + formatDouble(lowestReadSpeedMBps) + " Mbps");
-        }
-        Iris.info("Ram Usage: ");
-        Iris.info("- Total Ram: " + totalMemoryMB + " MB");
-        Iris.info("- Used Ram: " + usedMemoryMB + " MB");
-        Iris.info("- Total Process Ram: " + C.BLUE + getMaxMemoryUsage() + " MB");
-        Iris.info("- Total Paging Size: " + totalPageSize + " MB");
-        if (Winsat) {
-            Iris.info(C.BLUE + "Windows System Assessment Tool: ");
-            Iris.info("- CPU LZW Compression:" + C.BLUE + formatDouble(WindowsCPUCompression) + " MB/s");
-            Iris.info("- CPU AES256 Encryption: " + C.BLUE + formatDouble(WindowsCPUEncryption) + " MB/s");
-            Iris.info("- CPU SHA1 Hash: " + C.BLUE + formatDouble(WindowsCPUCSHA1) + " MB/s");
-            Iris.info("Duration: " + roundToTwoDecimalPlaces(elapsedTimeNs) + " Seconds");
-        }
-
-    }
-
-    public static long getMaxMemoryUsage() {
-        MemoryMXBean memoryMXBean = ManagementFactory.getMemoryMXBean();
-        MemoryUsage heapMemoryUsage = memoryMXBean.getHeapMemoryUsage();
-        MemoryUsage nonHeapMemoryUsage = memoryMXBean.getNonHeapMemoryUsage();
-        long maxHeapMemory = heapMemoryUsage.getMax();
-        long maxNonHeapMemory = nonHeapMemoryUsage.getMax();
-        long maxMemoryUsageMB = (maxHeapMemory + maxNonHeapMemory) / (1024 * 1024);
-        return maxMemoryUsageMB;
-    }
-
-    public static void getServerOS() {
-        SystemInfo systemInfo = new SystemInfo();
-        OperatingSystem os = systemInfo.getOperatingSystem();
-        ServerOS = os.toString();
-    }
-
-    public static boolean isRunningAsAdmin() {
-        if (ServerOS.contains("Windows")) {
-            try {
-                Process process = Runtime.getRuntime().exec("winsat disk");
-                process.waitFor();
-                return process.exitValue() == 0;
-            } catch (IOException | InterruptedException e) {
-                // Hmm
-            }
-        }
-        return false;
-    }
-
-    public static void warningFallback() {
-        Iris.info(C.RED + "Using the " + C.DARK_RED + "FALLBACK" + C.RED + " method due to compatibility issues. ");
-        Iris.info(C.RED + "Please note that this may result in less accurate results.");
-    }
-
-    private static String formatDouble(double value) {
-        return String.format("%.2f", value);
-    }
-
-    private static void startBenchmarkTimer() {
-        startTime = System.nanoTime();
-    }
-
-    private static double stopBenchmarkTimer() {
-        long endTime = System.nanoTime();
-        return (endTime - startTime) / 1_000_000_000.0;
-    }
-
-    private static double calculateIntegerMath() {
-        final int numIterations = 1_000_000_000;
-        final int numRuns = 30;
-        double totalMopsPerSec = 0;
-
-        for (int run = 0; run < numRuns; run++) {
-            long startTime = System.nanoTime();
-            int result = 0;
-
-            for (int i = 0; i < numIterations; i++) {
-                result += i * 2;
-                result -= i / 2;
-                result ^= i;
-                result <<= 1;
-                result >>= 1;
-            }
-
-            long endTime = System.nanoTime();
-            double elapsedSeconds = (endTime - startTime) / 1_000_000_000.0;
-            double mopsPerSec = (numIterations / elapsedSeconds) / 1_000_000.0;
-
-            totalMopsPerSec += mopsPerSec;
-        }
-
-        double averageMopsPerSec = totalMopsPerSec / numRuns;
-        return averageMopsPerSec;
-    }
-
-    private static double calculateFloatingPoint() {
-        long numIterations = 85_000_000;
-        int numRuns = 30;
-        double totalMopsPerSec = 0;
-        for (int run = 0; run < numRuns; run++) {
-            double result = 0;
-            long startTime = System.nanoTime();
-
-            for (int i = 0; i < numIterations; i++) {
-                result += Math.sqrt(i) * Math.sin(i) / (i + 1);
-            }
-
-            long endTime = System.nanoTime();
-            double elapsedSeconds = (endTime - startTime) / 1_000_000_000.0;
-            double mopsPerSec = (numIterations / elapsedSeconds) / 1_000_000.0;
-
-            totalMopsPerSec += mopsPerSec;
-        }
-
-        double averageMopsPerSec = totalMopsPerSec / numRuns;
-        return averageMopsPerSec;
-    }
-
-    private static double calculatePrimeNumbers() {
-        int primeCount;
-        long numIterations = 1_000_000;
-        int numRuns = 30;
-        double totalMopsPerSec = 0;
-
-        for (int run = 0; run < numRuns; run++) {
-            primeCount = 0;
-            long startTime = System.nanoTime();
-
-            for (int num = 2; primeCount < numIterations; num++) {
-                if (isPrime(num)) {
-                    primeCount++;
-                }
-            }
-
-            long endTime = System.nanoTime();
-            double elapsedSeconds = (endTime - startTime) / 1_000_000_000.0;
-            double mopsPerSec = (primeCount / elapsedSeconds) / 1_000_000.0;
-
-            totalMopsPerSec += mopsPerSec;
-        }
-
-        double averageMopsPerSec = totalMopsPerSec / numRuns;
-        return averageMopsPerSec;
-    }
-
-    private static double calculateStringSorting() {
-        int stringCount = 1_000_000;
-        int stringLength = 100;
-        int numRuns = 30;
-        double totalMopsPerSec = 0;
-
-        for (int run = 0; run < numRuns; run++) {
-            List<String> randomStrings = generateRandomStrings(stringCount, stringLength);
-            long startTime = System.nanoTime();
-            randomStrings.sort(String::compareTo);
-            long endTime = System.nanoTime();
-
-            double elapsedSeconds = (endTime - startTime) / 1_000_000_000.0;
-            double mopsPerSec = (stringCount / elapsedSeconds) / 1_000.0;
-
-            totalMopsPerSec += mopsPerSec;
-        }
-
-        double averageMopsPerSec = totalMopsPerSec / numRuns;
-        return averageMopsPerSec;
-    }
-
-    public static double calculateDataEncryption() {
-        int dataSizeMB = 100;
-        byte[] dataToEncrypt = generateRandomData(dataSizeMB * 1024 * 1024);
-        int numRuns = 20;
-        double totalMBytesPerSec = 0;
-
-        for (int run = 0; run < numRuns; run++) {
-            long startTime = System.nanoTime();
-            byte[] encryptedData = performEncryption(dataToEncrypt, 1);
-
-            long endTime = System.nanoTime();
-            double elapsedSeconds = (endTime - startTime) / 1_000_000_000.0;
-            double mbytesPerSec = (dataToEncrypt.length / (1024 * 1024.0)) / elapsedSeconds;
-
-            totalMBytesPerSec += mbytesPerSec;
-        }
-
-        double averageMBytesPerSec = totalMBytesPerSec / numRuns;
-        return averageMBytesPerSec;
-    }
-
-    private static byte[] performEncryption(byte[] data, int numRuns) {
-        byte[] key = "MyEncryptionKey".getBytes();
-        byte[] result = Arrays.copyOf(data, data.length);
-        for (int run = 0; run < numRuns; run++) {
-            for (int i = 0; i < result.length; i++) {
-                result[i] ^= key[i % key.length];
-            }
-        }
-        return result;
-    }
-
-    public static double calculateDataCompression() {
-        int dataSizeMB = 500;
-        byte[] dataToCompress = generateRandomData(dataSizeMB * 1024 * 1024);
-        long startTime = System.nanoTime();
-        byte[] compressedData = performCompression(dataToCompress);
-        long endTime = System.nanoTime();
-
-        double elapsedSeconds = (endTime - startTime) / 1e9;
-        double mbytesPerSec = (compressedData.length / (1024.0 * 1024.0)) / elapsedSeconds;
-
-        return mbytesPerSec;
-    }
-
-    private static byte[] performCompression(byte[] data) {
-        Deflater deflater = new Deflater();
-        deflater.setInput(data);
-        deflater.finish();
-        ByteArrayOutputStream outputStream = new ByteArrayOutputStream(data.length);
-
-        byte[] buffer = new byte[1024];
-        while (!deflater.finished()) {
-            int count = deflater.deflate(buffer);
-            outputStream.write(buffer, 0, count);
-        }
-
-        deflater.end();
-        return outputStream.toByteArray();
-    }
-
-    private static List<String> generateRandomStrings(int count, int length) {
-        SecureRandom random = new SecureRandom();
-        List<String> randomStrings = new ArrayList<>();
-
-        IntStream.range(0, count).forEach(i -> {
-            byte[] bytes = new byte[length];
-            random.nextBytes(bytes);
-            randomStrings.add(Base64.getEncoder().encodeToString(bytes));
-        });
-        return randomStrings;
-    }
-
-    private static byte[] generateRandomData(int size) {
-        SecureRandom random = new SecureRandom();
-        byte[] data = new byte[size];
-        random.nextBytes(data);
-        return data;
-    }
-
-    private static double roundToTwoDecimalPlaces(double value) {
-        return Double.parseDouble(String.format("%.2f", value));
-    }
-
-    private static double calculateCPUScore(long elapsedTimeNs) {
-        return 1.0 / (elapsedTimeNs / 1_000_000.0);
-    }
-
-    public static double calculateDiskSpeed() {
-        int numRuns = 10;
-        int fileSizeMB = 1000;
-
-        double[] writeSpeeds = new double[numRuns];
-        double[] readSpeeds = new double[numRuns];
-
-        for (int run = 0; run < numRuns; run++) {
-            long writeStartTime = System.nanoTime();
-            deleteTestFile(filePath);
-            createTestFile(filePath, fileSizeMB);
-            long writeEndTime = System.nanoTime();
-
-            long readStartTime = System.nanoTime();
-            readTestFile(filePath);
-            long readEndTime = System.nanoTime();
-
-            double writeSpeed = calculateDiskSpeedMBps(fileSizeMB, writeStartTime, writeEndTime);
-            double readSpeed = calculateDiskSpeedMBps(fileSizeMB, readStartTime, readEndTime);
-
-            writeSpeeds[run] = writeSpeed;
-            readSpeeds[run] = readSpeed;
-
-            if (run == 0) {
-                lowestWriteSpeedMBps = writeSpeed;
-                highestWriteSpeedMBps = writeSpeed;
-                lowestReadSpeedMBps = readSpeed;
-                highestReadSpeedMBps = readSpeed;
-            } else {
-                if (writeSpeed < lowestWriteSpeedMBps) {
-                    lowestWriteSpeedMBps = writeSpeed;
-                }
-                if (writeSpeed > highestWriteSpeedMBps) {
-                    highestWriteSpeedMBps = writeSpeed;
-                }
-                if (readSpeed < lowestReadSpeedMBps) {
-                    lowestReadSpeedMBps = readSpeed;
-                }
-                if (readSpeed > highestReadSpeedMBps) {
-                    highestReadSpeedMBps = readSpeed;
-                }
-            }
-        }
-        avgWriteSpeedMBps = calculateAverage(writeSpeeds);
-        avgReadSpeedMBps = calculateAverage(readSpeeds);
-        return 2;
-    }
-
-    public static void createTestFile(String filePath, int fileSizeMB) {
-        try {
-            File file = new File(filePath);
-            byte[] data = new byte[1024 * 1024];
-            Arrays.fill(data, (byte) 0);
-            FileOutputStream fos = new FileOutputStream(file);
-            for (int i = 0; i < fileSizeMB; i++) {
-                fos.write(data);
-            }
-            fos.close();
-        } catch (IOException e) {
-            e.printStackTrace();
-        }
-    }
-
-    public static void readTestFile(String filePath) {
-        try {
-            File file = new File(filePath);
-            FileInputStream fis = new FileInputStream(file);
-            byte[] buffer = new byte[1024];
-            while (fis.read(buffer) != -1) {
-            }
-            fis.close();
-        } catch (IOException e) {
-            e.printStackTrace();
-        }
-    }
-
-    public static void deleteTestFile(String filePath) {
-        File file = new File(filePath);
-        file.delete();
-    }
-
-    public static double calculateDiskSpeedMBps(int fileSizeMB, long startTime, long endTime) {
-        double elapsedSeconds = (endTime - startTime) / 1_000_000_000.0;
-        double writeSpeed = (fileSizeMB / elapsedSeconds);
-        return writeSpeed;
-    }
-
-    public static double calculateAverage(double[] values) {
-        double sum = 0;
-        for (double value : values) {
-            sum += value;
-        }
-        return sum / values.length;
-    }
-
-    public static void WindowsDiskSpeedTest() {
-        try {
-            String command = "winsat disk";
-            Process process = Runtime.getRuntime().exec(command);
-            BufferedReader reader = new BufferedReader(new InputStreamReader(process.getInputStream()));
-            String line;
-
-            while ((line = reader.readLine()) != null) {
-                Iris.debug(line);
-
-                if (line.contains("Disk  Sequential 64.0 Read")) {
-                    avgReadSpeedMBps = extractSpeed(line);
-                } else if (line.contains("Disk  Sequential 64.0 Write")) {
-                    avgWriteSpeedMBps = extractSpeed(line);
-                }
-            }
-
-            process.waitFor();
-            process.destroy();
-
-            Iris.debug("Sequential Read Speed: " + avgReadSpeedMBps + " MB/s");
-            Iris.debug("Sequential Write Speed: " + avgWriteSpeedMBps + " MB/s");
-        } catch (IOException | InterruptedException e) {
-            e.printStackTrace();
-        }
-    }
-
-    private static double extractSpeed(String line) {
-        String[] tokens = line.split("\\s+");
-        for (int i = 0; i < tokens.length; i++) {
-            if (tokens[i].endsWith("MB/s") && i > 0) {
-                try {
-                    return Double.parseDouble(tokens[i - 1]);
-                } catch (NumberFormatException e) {
-                    e.printStackTrace();
-                }
-            }
-        }
-        return 0.0;
-    }
-
-    public static void WindowsCpuSpeedTest() {
-        try {
-            String command = "winsat cpuformal";
-            Process process = Runtime.getRuntime().exec(command);
-            BufferedReader reader = new BufferedReader(new InputStreamReader(process.getInputStream()));
-            String line;
-
-            while ((line = reader.readLine()) != null) {
-                Iris.debug(line);
-
-                if (line.contains("CPU AES256 Encryption")) {
-                    WindowsCPUEncryption = extractCpuInfo(line);
-                }
-                if (line.contains("CPU LZW Compression")) {
-                    WindowsCPUCompression = extractCpuInfo(line);
-                }
-                if (line.contains("CPU SHA1 Hash")) {
-                    WindowsCPUCSHA1 = extractCpuInfo(line);
-                }
-            }
-            process.waitFor();
-            process.destroy();
-
-            Iris.debug("Winsat Encryption: " + WindowsCPUEncryption + " MB/s");
-        } catch (IOException | InterruptedException e) {
-            e.printStackTrace();
-        }
-    }
-
-    private static double extractCpuInfo(String line) {
-        String[] tokens = line.split("\\s+");
-        for (int i = 0; i < tokens.length; i++) {
-            if (tokens[i].endsWith("MB/s") && i > 0) {
-                try {
-                    return Double.parseDouble(tokens[i - 1]);
-                } catch (NumberFormatException e) {
-                    e.printStackTrace();
-                }
-            }
-        }
-        return 0.0;
-    }
-
-}

core/src/main/java/com/volmit/iris/core/tools/IrisToolbelt.java

@@ -24,6 +24,7 @@ import com.volmit.iris.core.gui.PregeneratorJob;
 import com.volmit.iris.core.loader.IrisData;
 import com.volmit.iris.core.pregenerator.PregenTask;
 import com.volmit.iris.core.pregenerator.PregeneratorMethod;
+import com.volmit.iris.core.pregenerator.methods.CachedPregenMethod;
 import com.volmit.iris.core.pregenerator.methods.HybridPregenMethod;
 import com.volmit.iris.core.service.StudioSVC;
 import com.volmit.iris.engine.framework.Engine;
@@ -141,7 +142,18 @@ public class IrisToolbelt {
      * @return the pregenerator job (already started)
      */
     public static PregeneratorJob pregenerate(PregenTask task, PregeneratorMethod method, Engine engine) {
-        return new PregeneratorJob(task, method, engine);
+        return pregenerate(task, method, engine, IrisSettings.get().getPregen().useCacheByDefault);
+    }
+
+    /**
+     * Start a pregenerator task
+     *
+     * @param task   the scheduled task
+     * @param method the method to execute the task
+     * @return the pregenerator job (already started)
+     */
+    public static PregeneratorJob pregenerate(PregenTask task, PregeneratorMethod method, Engine engine, boolean cached) {
+        return new PregeneratorJob(task, cached && engine != null ? new CachedPregenMethod(method, engine.getWorld().name()) : method, engine);
     }
 
     /**

core/src/main/java/com/volmit/iris/engine/IrisEngine.java

@@ -180,7 +180,10 @@ public class IrisEngine implements Engine {
                 File[] roots = getData().getLoaders()
                         .values()
                         .stream()
-                        .map(ResourceLoader::getRoot)
+                        .map(ResourceLoader::getFolderName)
+                        .map(n -> new File(getData().getDataFolder(), n))
+                        .filter(File::exists)
+                        .filter(File::isDirectory)
                         .toArray(File[]::new);
                 hash32.complete(IO.hashRecursive(roots));
             });

core/src/main/java/com/volmit/iris/engine/IrisWorldManager.java

@@ -55,6 +55,7 @@ import org.bukkit.event.block.BlockPlaceEvent;
 import org.bukkit.event.player.PlayerTeleportEvent;
 import org.bukkit.inventory.ItemStack;
 
+import java.lang.ref.WeakReference;
 import java.util.List;
 import java.util.Map;
 import java.util.Set;
@@ -367,7 +368,7 @@ public class IrisWorldManager extends EngineAssignedWorldManager {
 
     private void spawn(IrisPosition pos, IrisEntitySpawn i) {
         IrisSpawner ref = i.getReferenceSpawner();
-        if (!ref.canSpawn(getEngine(), pos.getX() >> 4, pos.getZ()))
+        if (!ref.canSpawn(getEngine(), pos.getX() >> 4, pos.getZ() >> 4))
             return;
 
         int s = i.spawn(getEngine(), pos, RNG.r);
@@ -422,9 +423,16 @@ public class IrisWorldManager extends EngineAssignedWorldManager {
             return;
         }
 
-        energy += 0.3;
-        fixEnergy();
-        getEngine().cleanupMantleChunk(e.getX(), e.getZ());
+        var ref = new WeakReference<>(e.getWorld());
+        int x = e.getX(), z = e.getZ();
+        J.s(() -> {
+            World world = ref.get();
+            if (world == null || !world.isChunkLoaded(x, z))
+                return;
+            energy += 0.3;
+            fixEnergy();
+            getEngine().cleanupMantleChunk(x, z);
+        }, IrisSettings.get().getPerformance().mantleCleanupDelay);
 
         if (generated) {
             //INMS.get().injectBiomesFromMantle(e, getMantle());

core/src/main/java/com/volmit/iris/engine/framework/Engine.java

@@ -75,6 +75,7 @@ import org.bukkit.entity.Player;
 import org.bukkit.inventory.Inventory;
 import org.bukkit.inventory.InventoryHolder;
 import org.bukkit.inventory.ItemStack;
+import org.jetbrains.annotations.Nullable;
 
 import java.awt.Color;
 import java.util.Arrays;
@@ -287,76 +288,79 @@ public interface Engine extends DataProvider, Fallible, LootProvider, BlockUpdat
             return;
         }
 
-        var chunk = mantle.getChunk(c);
-        if (chunk.isFlagged(MantleFlag.ETCHED)) return;
-        chunk.flag(MantleFlag.ETCHED, true);
+        var chunk = mantle.getChunk(c).use();
+        try {
+            Semaphore semaphore = new Semaphore(3);
+            chunk.raiseFlag(MantleFlag.ETCHED, () -> {
+                chunk.raiseFlag(MantleFlag.TILE, run(semaphore, () -> J.s(() -> {
+                    mantle.iterateChunk(c.getX(), c.getZ(), TileWrapper.class, (x, y, z, v) -> {
+                        int betterY = y + getWorld().minHeight();
+                        if (!TileData.setTileState(c.getBlock(x, betterY, z), v.getData()))
+                            Iris.warn("Failed to set tile entity data at [%d %d %d | %s] for tile %s!", x, betterY, z, c.getBlock(x, betterY, z).getBlockData().getMaterial().getKey(), v.getData().getMaterial().name());
+                    });
+                })));
+                chunk.raiseFlag(MantleFlag.CUSTOM, run(semaphore, () -> J.s(() -> {
+                    mantle.iterateChunk(c.getX(), c.getZ(), Identifier.class, (x, y, z, v) -> {
+                        Iris.service(ExternalDataSVC.class).processUpdate(this, c.getBlock(x & 15, y + getWorld().minHeight(), z & 15), v);
+                    });
+                })));
 
-        Semaphore semaphore = new Semaphore(3);
-        chunk.raiseFlag(MantleFlag.TILE, run(semaphore, () -> J.s(() -> {
-            mantle.iterateChunk(c.getX(), c.getZ(), TileWrapper.class, (x, y, z, v) -> {
-                int betterY = y + getWorld().minHeight();
-                if (!TileData.setTileState(c.getBlock(x, betterY, z), v.getData()))
-                    Iris.warn("Failed to set tile entity data at [%d %d %d | %s] for tile %s!", x, betterY, z, c.getBlock(x, betterY, z).getBlockData().getMaterial().getKey(), v.getData().getMaterial().name());
-            });
-        })));
-        chunk.raiseFlag(MantleFlag.CUSTOM, run(semaphore, () -> J.s(() -> {
-            mantle.iterateChunk(c.getX(), c.getZ(), Identifier.class, (x, y, z, v) -> {
-                Iris.service(ExternalDataSVC.class).processUpdate(this, c.getBlock(x & 15, y + getWorld().minHeight(), z & 15), v);
-            });
-        })));
-
-        chunk.raiseFlag(MantleFlag.UPDATE, run(semaphore, () -> J.s(() -> {
-            PrecisionStopwatch p = PrecisionStopwatch.start();
-            KMap<Long, Integer> updates = new KMap<>();
-            RNG r = new RNG(Cache.key(c.getX(), c.getZ()));
-            mantle.iterateChunk(c.getX(), c.getZ(), MatterCavern.class, (x, yf, z, v) -> {
-                int y = yf + getWorld().minHeight();
-                if (!B.isFluid(c.getBlock(x & 15, y, z & 15).getBlockData())) {
-                    return;
-                }
-                boolean u = false;
-                if (B.isAir(c.getBlock(x & 15, y, z & 15).getRelative(BlockFace.DOWN).getBlockData())) {
-                    u = true;
-                } else if (B.isAir(c.getBlock(x & 15, y, z & 15).getRelative(BlockFace.WEST).getBlockData())) {
-                    u = true;
-                } else if (B.isAir(c.getBlock(x & 15, y, z & 15).getRelative(BlockFace.EAST).getBlockData())) {
-                    u = true;
-                } else if (B.isAir(c.getBlock(x & 15, y, z & 15).getRelative(BlockFace.SOUTH).getBlockData())) {
-                    u = true;
-                } else if (B.isAir(c.getBlock(x & 15, y, z & 15).getRelative(BlockFace.NORTH).getBlockData())) {
-                    u = true;
-                }
-
-                if (u) {
-                    updates.compute(Cache.key(x & 15, z & 15), (k, vv) -> {
-                        if (vv != null) {
-                            return Math.max(vv, y);
+                chunk.raiseFlag(MantleFlag.UPDATE, run(semaphore, () -> J.s(() -> {
+                    PrecisionStopwatch p = PrecisionStopwatch.start();
+                    KMap<Long, Integer> updates = new KMap<>();
+                    RNG r = new RNG(Cache.key(c.getX(), c.getZ()));
+                    mantle.iterateChunk(c.getX(), c.getZ(), MatterCavern.class, (x, yf, z, v) -> {
+                        int y = yf + getWorld().minHeight();
+                        if (!B.isFluid(c.getBlock(x & 15, y, z & 15).getBlockData())) {
+                            return;
+                        }
+                        boolean u = false;
+                        if (B.isAir(c.getBlock(x & 15, y, z & 15).getRelative(BlockFace.DOWN).getBlockData())) {
+                            u = true;
+                        } else if (B.isAir(c.getBlock(x & 15, y, z & 15).getRelative(BlockFace.WEST).getBlockData())) {
+                            u = true;
+                        } else if (B.isAir(c.getBlock(x & 15, y, z & 15).getRelative(BlockFace.EAST).getBlockData())) {
+                            u = true;
+                        } else if (B.isAir(c.getBlock(x & 15, y, z & 15).getRelative(BlockFace.SOUTH).getBlockData())) {
+                            u = true;
+                        } else if (B.isAir(c.getBlock(x & 15, y, z & 15).getRelative(BlockFace.NORTH).getBlockData())) {
+                            u = true;
                         }
 
-                        return y;
+                        if (u) {
+                            updates.compute(Cache.key(x & 15, z & 15), (k, vv) -> {
+                                if (vv != null) {
+                                    return Math.max(vv, y);
+                                }
+
+                                return y;
+                            });
+                        }
                     });
-                }
+
+                    updates.forEach((k, v) -> update(Cache.keyX(k), v, Cache.keyZ(k), c, r));
+                    mantle.iterateChunk(c.getX(), c.getZ(), MatterUpdate.class, (x, yf, z, v) -> {
+                        int y = yf + getWorld().minHeight();
+                        if (v != null && v.isUpdate()) {
+                            int vx = x & 15;
+                            int vz = z & 15;
+                            update(x, y, z, c, new RNG(Cache.key(c.getX(), c.getZ())));
+                            if (vx > 0 && vx < 15 && vz > 0 && vz < 15) {
+                                updateLighting(x, y, z, c);
+                            }
+                        }
+                    });
+                    mantle.deleteChunkSlice(c.getX(), c.getZ(), MatterUpdate.class);
+                    getMetrics().getUpdates().put(p.getMilliseconds());
+                }, RNG.r.i(0, 20))));
             });
 
-            updates.forEach((k, v) -> update(Cache.keyX(k), v, Cache.keyZ(k), c, r));
-            mantle.iterateChunk(c.getX(), c.getZ(), MatterUpdate.class, (x, yf, z, v) -> {
-                int y = yf + getWorld().minHeight();
-                if (v != null && v.isUpdate()) {
-                    int vx = x & 15;
-                    int vz = z & 15;
-                    update(x, y, z, c, new RNG(Cache.key(c.getX(), c.getZ())));
-                    if (vx > 0 && vx < 15 && vz > 0 && vz < 15) {
-                        updateLighting(x, y, z, c);
-                    }
-                }
-            });
-            mantle.deleteChunkSlice(c.getX(), c.getZ(), MatterUpdate.class);
-            getMetrics().getUpdates().put(p.getMilliseconds());
-        }, RNG.r.i(0, 20))));
-
-        try {
-            semaphore.acquire(3);
-        } catch (InterruptedException ignored) {}
+            try {
+                semaphore.acquire(3);
+            } catch (InterruptedException ignored) {}
+        } finally {
+            chunk.release();
+        }
     }
 
     private static Runnable run(Semaphore semaphore, Runnable runnable) {
@@ -852,6 +856,25 @@ public interface Engine extends DataProvider, Fallible, LootProvider, BlockUpdat
         return getBiomeOrMantle(l.getBlockX(), l.getBlockY(), l.getBlockZ());
     }
 
+    @Nullable
+    @BlockCoordinates
+    default Position2 getNearestStronghold(Position2 pos) {
+        KList<Position2> p = getDimension().getStrongholds(getSeedManager().getMantle());
+        if (p.isEmpty()) return null;
+
+        Position2 pr = null;
+        double d = Double.MAX_VALUE;
+
+        for (Position2 i : p) {
+            double dx = i.distance(pos);
+            if (dx < d) {
+                d = dx;
+                pr = i;
+            }
+        }
+        return pr;
+    }
+
     default void gotoBiome(IrisBiome biome, Player player, boolean teleport) {
         Set<String> regionKeys = getDimension()
                 .getAllRegions(this).stream()
@@ -872,31 +895,10 @@ public interface Engine extends DataProvider, Fallible, LootProvider, BlockUpdat
 
     default void gotoJigsaw(IrisJigsawStructure s, Player player, boolean teleport) {
         if (s.getLoadKey().equals(getDimension().getStronghold())) {
-            KList<Position2> p = getDimension().getStrongholds(getSeedManager().getMantle());
-
-            if (p.isEmpty()) {
+            Position2 pr = getNearestStronghold(new Position2(player.getLocation().getBlockX(), player.getLocation().getBlockZ()));
+            if (pr == null) {
                 player.sendMessage(C.GOLD + "No strongholds in world.");
-            }
-
-            Position2 px = new Position2(player.getLocation().getBlockX(), player.getLocation().getBlockZ());
-            Position2 pr = null;
-            double d = Double.MAX_VALUE;
-
-            Iris.debug("Ps: " + p.size());
-
-            for (Position2 i : p) {
-                Iris.debug("- " + i.getX() + " " + i.getZ());
-            }
-
-            for (Position2 i : p) {
-                double dx = i.distance(px);
-                if (dx < d) {
-                    d = dx;
-                    pr = i;
-                }
-            }
-
-            if (pr != null) {
+            } else {
                 Location ll = new Location(player.getWorld(), pr.getX(), 40, pr.getZ());
                 J.s(() -> player.teleport(ll));
             }

core/src/main/java/com/volmit/iris/engine/framework/EngineAssignedWorldManager.java

@@ -97,51 +97,6 @@ public abstract class EngineAssignedWorldManager extends EngineAssignedComponent
         }
     }
 
-    @EventHandler
-    public void onItemUse(PlayerInteractEvent e) {
-        if (e.getItem() == null || e.getHand() != EquipmentSlot.HAND) {
-            return;
-        }
-        if (e.getAction() == Action.LEFT_CLICK_BLOCK || e.getAction() == Action.LEFT_CLICK_AIR) {
-            return;
-        }
-        if (e.getPlayer().getWorld().equals(getTarget().getWorld().realWorld()) && e.getItem().getType() == Material.ENDER_EYE) {
-            if (e.getClickedBlock() != null && e.getClickedBlock().getType() == Material.END_PORTAL_FRAME) {
-                return;
-            }
-
-            KList<Position2> positions = getEngine().getDimension().getStrongholds(getEngine().getSeedManager().getMantle());
-            if (positions.isEmpty()) {
-                return;
-            }
-
-            Position2 playerPos = new Position2(e.getPlayer().getLocation().getBlockX(), e.getPlayer().getLocation().getBlockZ());
-            Position2 pr = positions.get(0);
-            double d = pr.distance(playerPos);
-
-            for (Position2 pos : positions) {
-                double distance = pos.distance(playerPos);
-                if (distance < d) {
-                    d = distance;
-                    pr = pos;
-                }
-            }
-
-            if (e.getPlayer().getGameMode() != GameMode.CREATIVE) {
-                if (e.getItem().getAmount() > 1) {
-                    e.getPlayer().getInventory().getItemInMainHand().setAmount(e.getItem().getAmount() - 1);
-                } else {
-                    e.getPlayer().getInventory().setItemInMainHand(null);
-                }
-            }
-
-            EnderSignal eye = e.getPlayer().getWorld().spawn(e.getPlayer().getLocation().clone().add(0, 0.5F, 0), EnderSignal.class);
-            eye.setTargetLocation(new Location(e.getPlayer().getWorld(), pr.getX(), 40, pr.getZ()));
-            eye.getWorld().playSound(eye, Sound.ENTITY_ENDER_EYE_LAUNCH, 1, 1);
-            Iris.debug("ESignal: " + eye.getTargetLocation().getBlockX() + " " + eye.getTargetLocation().getBlockX());
-        }
-    }
-
     @EventHandler
     public void on(WorldUnloadEvent e) {
         if (e.getWorld().equals(getTarget().getWorld().realWorld())) {

core/src/main/java/com/volmit/iris/engine/mantle/EngineMantle.java

@@ -289,23 +289,25 @@ public interface EngineMantle extends IObjectPlacer {
     }
 
     default void cleanupChunk(int x, int z) {
-        if (!getMantle().hasFlag(x, z, MantleFlag.CLEANED) && isCovered(x, z)) {
-            getMantle().raiseFlag(x, z, MantleFlag.CLEANED, () -> {
-                getMantle().deleteChunkSlice(x, z, BlockData.class);
-                getMantle().deleteChunkSlice(x, z, String.class);
-                getMantle().deleteChunkSlice(x, z, MatterCavern.class);
-                getMantle().deleteChunkSlice(x, z, MatterFluidBody.class);
+        if (!isCovered(x, z)) return;
+        MantleChunk chunk = getMantle().getChunk(x, z).use();
+        try {
+            chunk.raiseFlag(MantleFlag.CLEANED, () -> {
+                chunk.deleteSlices(BlockData.class);
+                chunk.deleteSlices(String.class);
+                chunk.deleteSlices(MatterCavern.class);
+                chunk.deleteSlices(MatterFluidBody.class);
             });
+        } finally {
+            chunk.release();
         }
     }
 
-    default long getToUnload(){
-        return getMantle().getToUnload().size();
+    default long getUnloadRegionCount() {
+        return getMantle().getUnloadRegionCount();
     }
-    default long getNotQueuedLoadedRegions(){
-        return getMantle().getLoadedRegions().size() - getMantle().getToUnload().size();
-    }
-    default double getTectonicDuration(){
-        return getMantle().getAdjustedIdleDuration().get();
+
+    default double getAdjustedIdleDuration() {
+        return getMantle().getAdjustedIdleDuration();
     }
 }

core/src/main/java/com/volmit/iris/engine/mantle/components/MantleJigsawComponent.java

@@ -93,27 +93,13 @@ public class MantleJigsawComponent extends IrisMantleComponent {
         try {
             if (i == null || checkMinDistances(i.collectMinDistances(), x, z, cachedRegions, cache, distanceCache))
                 return false;
-            if (!checkBiomes(i, x, z))
-                return false;
-        } catch (Throwable ignored) {
-        }
+        } catch (Throwable ignored) {}
         RNG rng = new RNG(seed);
         IrisPosition position = new IrisPosition((x << 4) + rng.nextInt(15), 0, (z << 4) + rng.nextInt(15));
         IrisJigsawStructure structure = getData().getJigsawStructureLoader().load(i.getStructure());
         return place(writer, position, structure, rng, false);
     }
 
-    private boolean checkBiomes(IrisJigsawStructurePlacement placement, int x, int z) {
-        var biome = getEngineMantle().getEngine().getSurfaceBiome((x << 4) + 8, (z << 4) + 8);
-        if (biome == null) {
-            return true;
-        }
-        var exclude = placement.getExclude();
-        return !(biome.isSea() && exclude.isExcludeOceanBiomes() ||
-                biome.isLand() && exclude.isExcludeLandBiomes() ||
-                biome.isShore() && exclude.isExcludeShoreBiomes());
-    }
-
     @ChunkCoordinates
     private boolean checkMinDistances(KMap<String, Integer> minDistances, int x, int z, KSet<Position2> cachedRegions, KMap<String, KSet<Position2>> cache, KMap<Position2, Double> distanceCache) {
         int range = 0;

core/src/main/java/com/volmit/iris/engine/modifier/IrisCarveModifier.java

@@ -43,7 +43,6 @@ import org.bukkit.block.data.BlockData;
 public class IrisCarveModifier extends EngineAssignedModifier<BlockData> {
     private final RNG rng;
     private final BlockData AIR = Material.CAVE_AIR.createBlockData();
-    private final BlockData WATER = Material.WATER.createBlockData();
     private final BlockData LAVA = Material.LAVA.createBlockData();
     private final IrisDecorantActuator decorant;
 
@@ -103,7 +102,7 @@ public class IrisCarveModifier extends EngineAssignedModifier<BlockData> {
             }
 
             if (c.isWater()) {
-                output.set(rx, yy, rz, WATER);
+                output.set(rx, yy, rz, context.getFluid().get(rx, rz));
             } else if (c.isLava()) {
                 output.set(rx, yy, rz, LAVA);
             } else {

core/src/main/java/com/volmit/iris/engine/object/IrisContextInjector.java

@@ -2,12 +2,15 @@ package com.volmit.iris.engine.object;
 
 import com.volmit.iris.core.nms.INMS;
 import com.volmit.iris.core.nms.container.AutoClosing;
+import com.volmit.iris.util.collection.KList;
 import com.volmit.iris.util.misc.ServerProperties;
 import lombok.Getter;
 import org.bukkit.Bukkit;
+import org.bukkit.NamespacedKey;
 import org.bukkit.configuration.ConfigurationSection;
 import org.bukkit.configuration.file.YamlConfiguration;
 import org.bukkit.event.EventHandler;
+import org.bukkit.event.EventPriority;
 import org.bukkit.event.Listener;
 import org.bukkit.event.world.WorldInitEvent;
 
@@ -19,14 +22,9 @@ public class IrisContextInjector implements Listener {
     @Getter
     private static boolean missingDimensionTypes = false;
     private AutoClosing autoClosing = null;
-    private final int totalWorlds;
-    private int worldCounter = 0;
 
     public IrisContextInjector() {
-        if (!Bukkit.getWorlds().isEmpty()) {
-            totalWorlds = 0;
-            return;
-        }
+        if (!Bukkit.getWorlds().isEmpty()) return;
 
         String levelName = ServerProperties.LEVEL_NAME;
         List<String> irisWorlds = irisWorlds();
@@ -34,29 +32,20 @@ public class IrisContextInjector implements Listener {
         boolean nether = irisWorlds.contains(levelName + "_nether");
         boolean end = irisWorlds.contains(levelName + "_end");
 
-        int i = 1;
-        if (Bukkit.getAllowNether()) i++;
-        if (Bukkit.getAllowEnd()) i++;
-
         if (INMS.get().missingDimensionTypes(overworld, nether, end)) {
             missingDimensionTypes = true;
-            totalWorlds = 0;
             return;
         }
 
         if (overworld || nether || end) {
-            var pair = INMS.get().injectUncached(overworld, nether, end);
-            i += pair.getA() - 3;
-            autoClosing = pair.getB();
+            autoClosing = INMS.get().injectUncached(overworld, nether, end);
         }
 
-        totalWorlds = i;
         instance.registerListener(this);
     }
 
-    @EventHandler
+    @EventHandler(priority = EventPriority.LOWEST)
     public void on(WorldInitEvent event) {
-        if (++worldCounter < totalWorlds) return;
         if (autoClosing != null) {
             autoClosing.close();
             autoClosing = null;

core/src/main/java/com/volmit/iris/engine/object/IrisEntitySpawn.java

@@ -28,7 +28,6 @@ import com.volmit.iris.util.math.RNG;
 import com.volmit.iris.util.math.Vector3d;
 import com.volmit.iris.util.matter.MatterMarker;
 import com.volmit.iris.util.matter.slices.MarkerMatter;
-import io.lumine.mythic.bukkit.adapters.BukkitEntity;
 import lombok.AllArgsConstructor;
 import lombok.Data;
 import lombok.NoArgsConstructor;
@@ -38,9 +37,6 @@ import org.bukkit.Location;
 import org.bukkit.Material;
 import org.bukkit.World;
 import org.bukkit.entity.Entity;
-import org.bukkit.entity.EntityType;
-import org.bukkit.entity.LivingEntity;
-import org.bukkit.util.BoundingBox;
 
 @Snippet("entity-spawn")
 @Accessors(chain = true)
@@ -116,8 +112,8 @@ public class IrisEntitySpawn implements IRare {
         World world = gen.getWorld().realWorld();
         if (spawns > 0) {
 
-            if (referenceMarker != null) {
-                gen.getMantle().getMantle().remove(c.getX(), c.getY(), c.getZ(), MatterMarker.class);
+            if (referenceMarker != null && referenceMarker.shouldExhaust()) {
+                gen.getMantle().getMantle().remove(c.getX(), c.getY() - gen.getWorld().minHeight(), c.getZ(), MatterMarker.class);
             }
 
             for (int id = 0; id < spawns; id++) {

core/src/main/java/com/volmit/iris/engine/object/IrisImage.java

@@ -123,6 +123,8 @@ public class IrisImage extends IrisRegistrant {
     }
 
     public void writeDebug(IrisImageChannel channel) {
+
+
         try {
             File at = new File(getLoadFile().getParentFile(), "debug-see-" + getLoadFile().getName());
             BufferedImage b = new BufferedImage(getWidth(), getHeight(), BufferedImage.TYPE_INT_RGB);

core/src/main/java/com/volmit/iris/engine/object/IrisJigsawStructurePlacement.java

@@ -78,9 +78,6 @@ public class IrisJigsawStructurePlacement implements IRare {
     @Desc("Threshold for noise style")
     private double threshold = 0.5;
 
-    @Desc("Exclude the structure from certain places")
-    private IrisPlacementExclusion exclude = new IrisPlacementExclusion();
-
     @ArrayType(type = IrisJigsawMinDistance.class)
     @Desc("List of minimum distances to check for")
     private KList<IrisJigsawMinDistance> minDistances = new KList<>();

core/src/main/java/com/volmit/iris/engine/object/IrisMarker.java

@@ -51,10 +51,10 @@ public class IrisMarker extends IrisRegistrant {
     private boolean emptyAbove = true;
 
     @Desc("If this marker is used, what is the chance it removes itself. For example 25% (0.25) would mean that on average 4 uses will remove a specific marker. Set this below 0 (-1) to never exhaust & set this to 1 or higher to always exhaust on first use.")
-    private double exhaustionChance = 0.33;
+    private double exhaustionChance = 0;
 
     public boolean shouldExhaust() {
-        return RNG.r.chance(exhaustionChance);
+        return exhaustionChance > RNG.r.nextDouble();
     }
 
     @Override

core/src/main/java/com/volmit/iris/engine/object/IrisPlacementExclusion.java

@@ -1,33 +0,0 @@
-package com.volmit.iris.engine.object;
-
-import com.volmit.iris.engine.object.annotations.ArrayType;
-import com.volmit.iris.engine.object.annotations.Desc;
-import com.volmit.iris.engine.object.annotations.RegistryListResource;
-import com.volmit.iris.util.collection.KList;
-import lombok.AllArgsConstructor;
-import lombok.Data;
-import lombok.NoArgsConstructor;
-import lombok.experimental.Accessors;
-
-@Accessors(chain = true)
-@NoArgsConstructor
-@AllArgsConstructor
-@Desc("Represents an image map")
-@Data
-public class IrisPlacementExclusion {
-
-    @Desc("Excludes the structure from all ocean biomes defined in region")
-    private boolean excludeOceanBiomes;
-
-    @Desc("Excludes the structure from all shore biomes defined in region")
-    private boolean excludeShoreBiomes;
-
-    @Desc("Excludes the structure from all land biomes defined in region")
-    private boolean excludeLandBiomes;
-
-    @RegistryListResource(IrisBiome.class)
-    @Desc("tbd")
-    @ArrayType(min = 1, type = String.class)
-    private KList<String> excludeBiomes = new KList<>();
-
-}

core/src/main/java/com/volmit/iris/engine/platform/BukkitChunkGenerator.java

@@ -21,6 +21,7 @@ package com.volmit.iris.engine.platform;
 import com.volmit.iris.Iris;
 import com.volmit.iris.core.loader.IrisData;
 import com.volmit.iris.core.nms.INMS;
+import com.volmit.iris.core.nms.container.AutoClosing;
 import com.volmit.iris.core.service.StudioSVC;
 import com.volmit.iris.engine.IrisEngine;
 import com.volmit.iris.engine.data.chunk.TerrainChunk;
@@ -39,6 +40,7 @@ import com.volmit.iris.util.io.ReactiveFolder;
 import com.volmit.iris.util.scheduling.ChronoLatch;
 import com.volmit.iris.util.scheduling.J;
 import com.volmit.iris.util.scheduling.Looper;
+import io.papermc.lib.PaperLib;
 import lombok.Data;
 import lombok.EqualsAndHashCode;
 import lombok.Setter;
@@ -48,6 +50,7 @@ import org.bukkit.block.data.BlockData;
 import org.bukkit.entity.Entity;
 import org.bukkit.entity.Player;
 import org.bukkit.event.EventHandler;
+import org.bukkit.event.EventPriority;
 import org.bukkit.event.Listener;
 import org.bukkit.event.world.WorldInitEvent;
 import org.bukkit.generator.BiomeProvider;
@@ -84,12 +87,12 @@ public class BukkitChunkGenerator extends ChunkGenerator implements PlatformChun
     private final boolean studio;
     private final AtomicInteger a = new AtomicInteger(0);
     private final CompletableFuture<Integer> spawnChunks = new CompletableFuture<>();
-    private Engine engine;
-    private Looper hotloader;
-    private StudioMode lastMode;
-    private DummyBiomeProvider dummyBiomeProvider;
+    private volatile Engine engine;
+    private volatile Looper hotloader;
+    private volatile StudioMode lastMode;
+    private volatile DummyBiomeProvider dummyBiomeProvider;
     @Setter
-    private StudioGenerator studioGenerator;
+    private volatile StudioGenerator studioGenerator;
 
     private boolean initialized = false;
 
@@ -108,25 +111,13 @@ public class BukkitChunkGenerator extends ChunkGenerator implements PlatformChun
         Bukkit.getServer().getPluginManager().registerEvents(this, Iris.instance);
     }
 
-    private static Field getField(Class clazz, String fieldName)
-            throws NoSuchFieldException {
-        try {
-            return clazz.getDeclaredField(fieldName);
-        } catch (NoSuchFieldException e) {
-            Class superClass = clazz.getSuperclass();
-            if (superClass == null) {
-                throw e;
-            } else {
-                return getField(superClass, fieldName);
-            }
-        }
-    }
-
-    @EventHandler
+    @EventHandler(priority = EventPriority.LOWEST)
     public void onWorldInit(WorldInitEvent event) {
         try {
             if (initialized || !world.name().equals(event.getWorld().getName()))
                 return;
+            AutoClosing.closeContext();
+            INMS.get().removeCustomDimensions(event.getWorld());
             world.setRawWorldSeed(event.getWorld().getSeed());
             Engine engine = getEngine(event.getWorld());
             if (engine == null) {
@@ -154,6 +145,20 @@ public class BukkitChunkGenerator extends ChunkGenerator implements PlatformChun
         }
     }
 
+    @Nullable
+    @Override
+    public Location getFixedSpawnLocation(@NotNull World world, @NotNull Random random) {
+        Location location = new Location(world, 0, 64, 0);
+        PaperLib.getChunkAtAsync(location)
+                .thenAccept(c -> {
+                    World w = c.getWorld();
+                    if (!w.getSpawnLocation().equals(location))
+                        return;
+                    w.setSpawnLocation(location.add(0, w.getHighestBlockYAt(location) - 64, 0));
+                });
+        return location;
+    }
+
     private void setupEngine() {
         IrisData data = IrisData.get(dataLocation);
         IrisDimension dimension = data.getDimensionLoader().load(dimensionKey);
@@ -297,7 +302,9 @@ public class BukkitChunkGenerator extends ChunkGenerator implements PlatformChun
                 hotloader.interrupt();
             }
 
-            getEngine().close();
+            final Engine engine = getEngine();
+            if (engine != null && !engine.isClosed())
+                engine.close();
             folder.clear();
             populators.clear();
 

core/src/main/java/com/volmit/iris/util/atomics/AtomicAverage.java

@@ -31,11 +31,11 @@ import com.volmit.iris.util.data.DoubleArrayUtils;
  */
 public class AtomicAverage {
     protected final AtomicDoubleArray values;
-    protected int cursor;
-    private double average;
-    private double lastSum;
-    private boolean dirty;
-    private boolean brandNew;
+    protected transient int cursor;
+    private transient double average;
+    private transient double lastSum;
+    private transient boolean dirty;
+    private transient boolean brandNew;
 
     /**
      * Create an average holder
@@ -57,7 +57,7 @@ public class AtomicAverage {
      *
      * @param i the value
      */
-    public void put(double i) {
+    public synchronized void put(double i) {
 
         try {
             dirty = true;

core/src/main/java/com/volmit/iris/util/collection/KList.java

@@ -26,6 +26,8 @@ import com.volmit.iris.util.math.RNG;
 import java.util.*;
 import java.util.function.Function;
 import java.util.function.Predicate;
+import java.util.stream.Collector;
+import java.util.stream.Collectors;
 
 @SuppressWarnings("ALL")
 public class KList<T> extends ArrayList<T> implements List<T> {
@@ -65,6 +67,10 @@ public class KList<T> extends ArrayList<T> implements List<T> {
         return s;
     }
 
+    public static <T> Collector<T, ?, KList<T>> collector() {
+        return Collectors.toCollection(KList::new);
+    }
+
     public static KList<String> asStringList(List<?> oo) {
         KList<String> s = new KList<String>();
 

core/src/main/java/com/volmit/iris/util/collection/KSet.java

@@ -18,29 +18,67 @@
 
 package com.volmit.iris.util.collection;
 
-import java.util.Collection;
-import java.util.HashSet;
+import org.jetbrains.annotations.NotNull;
 
-public class KSet<T> extends HashSet<T> {
+import java.io.Serializable;
+import java.util.AbstractSet;
+import java.util.Collection;
+import java.util.Iterator;
+import java.util.concurrent.ConcurrentHashMap;
+
+public class KSet<T> extends AbstractSet<T> implements Serializable {
     private static final long serialVersionUID = 1L;
+    private final ConcurrentHashMap<T, Boolean> map;
 
     public KSet() {
-        super();
+        map = new ConcurrentHashMap<>();
     }
 
     public KSet(Collection<? extends T> c) {
-        super(c);
+        this();
+        addAll(c);
     }
 
     public KSet(int initialCapacity, float loadFactor) {
-        super(initialCapacity, loadFactor);
+        map = new ConcurrentHashMap<>(initialCapacity, loadFactor);
     }
 
     public KSet(int initialCapacity) {
-        super(initialCapacity);
+        map = new ConcurrentHashMap<>(initialCapacity);
+    }
+
+    @Override
+    public int size() {
+        return map.size();
+    }
+
+    @Override
+    public boolean contains(Object o) {
+        return map.containsKey(o);
+    }
+
+    @Override
+    public boolean add(T t) {
+        return map.putIfAbsent(t, Boolean.TRUE) == null;
+    }
+
+    @Override
+    public boolean remove(Object o) {
+        return map.remove(o) != null;
+    }
+
+    @Override
+    public void clear() {
+        map.clear();
+    }
+
+    @NotNull
+    @Override
+    public Iterator<T> iterator() {
+        return map.keySet().iterator();
     }
 
     public KSet<T> copy() {
-        return new KSet<T>(this);
+        return new KSet<>(this);
     }
 }

core/src/main/java/com/volmit/iris/util/decree/handlers/ImageChannelHandler.java

@@ -1,53 +0,0 @@
-/*
- * Iris is a World Generator for Minecraft Bukkit Servers
- * Copyright (c) 2022 Arcane Arts (Volmit Software)
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
- */
-
-package com.volmit.iris.util.decree.handlers;
-
-import com.volmit.iris.engine.object.IrisImageChannel;
-import com.volmit.iris.util.collection.KList;
-import com.volmit.iris.util.decree.DecreeParameterHandler;
-import com.volmit.iris.util.decree.exceptions.DecreeParsingException;
-
-import java.util.Arrays;
-
-public class ImageChannelHandler implements DecreeParameterHandler<IrisImageChannel> {
-    @Override
-    public KList<IrisImageChannel> getPossibilities() {
-        return new KList<>(Arrays.stream(IrisImageChannel.values()).toList());
-    }
-
-    @Override
-    public String toString(IrisImageChannel channel) {
-        return channel.name();
-    }
-
-    @Override
-    public IrisImageChannel parse(String in, boolean force) throws DecreeParsingException {
-        return IrisImageChannel.valueOf(in);
-    }
-
-    @Override
-    public boolean supports(Class<?> type) {
-        return type.equals(IrisImageChannel.class);
-    }
-
-    @Override
-    public String getRandomDefault() {
-        return IrisImageChannel.BRIGHTNESS.toString();
-    }
-}

core/src/main/java/com/volmit/iris/util/decree/specialhandlers/NullableBiomeHandler.java

@@ -1,31 +0,0 @@
-/*
- *  Iris is a World Generator for Minecraft Bukkit Servers
- *  Copyright (c) 2024 Arcane Arts (Volmit Software)
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
- */
-
-package com.volmit.iris.util.decree.specialhandlers;
-
-import com.volmit.iris.engine.object.IrisBiome;
-import com.volmit.iris.util.decree.exceptions.DecreeParsingException;
-import com.volmit.iris.util.decree.handlers.BiomeHandler;
-
-public class NullableBiomeHandler extends BiomeHandler {
-
-    @Override
-    public IrisBiome parse(String in, boolean force) throws DecreeParsingException {
-        return getPossibilities(in).stream().filter((i) -> toString(i).equalsIgnoreCase(in)).findFirst().orElse(null);
-    }
-}

core/src/main/java/com/volmit/iris/util/decree/specialhandlers/NullableRegionHandler.java

@@ -1,31 +0,0 @@
-/*
- *  Iris is a World Generator for Minecraft Bukkit Servers
- *  Copyright (c) 2024 Arcane Arts (Volmit Software)
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
- */
-
-package com.volmit.iris.util.decree.specialhandlers;
-
-import com.volmit.iris.engine.object.IrisRegion;
-import com.volmit.iris.util.decree.exceptions.DecreeParsingException;
-import com.volmit.iris.util.decree.handlers.RegionHandler;
-
-public class NullableRegionHandler extends RegionHandler {
-
-    @Override
-    public IrisRegion parse(String in, boolean force) throws DecreeParsingException {
-        return getPossibilities(in).stream().filter((i) -> toString(i).equalsIgnoreCase(in)).findFirst().orElse(null);
-    }
-}

core/src/main/java/com/volmit/iris/util/io/IO.java

@@ -18,6 +18,10 @@
 
 package com.volmit.iris.util.io;
 
+import com.google.gson.JsonArray;
+import com.google.gson.JsonElement;
+import com.google.gson.JsonObject;
+import com.google.gson.JsonParser;
 import com.volmit.iris.Iris;
 import com.volmit.iris.util.format.Form;
 
@@ -134,8 +138,7 @@ public class IO {
                     continue;
                 }
 
-                try (var fin = new FileInputStream(file)) {
-                    var din = new CheckedInputStream(fin, crc);
+                try (var din = new CheckedInputStream(readDeterministic(file), crc)) {
                     fullTransfer(din, new VoidOutputStream(), 8192);
                 } catch (IOException e) {
                     Iris.reportError(e);
@@ -152,10 +155,43 @@ public class IO {
         return 0;
     }
 
+    public static InputStream readDeterministic(File file) throws IOException {
+        if (!file.getName().endsWith(".json"))
+            return new FileInputStream(file);
+
+        JsonElement json;
+        try (FileReader reader = new FileReader(file)) {
+            json = JsonParser.parseReader(reader);
+        }
+
+        var queue = new LinkedList<JsonElement>();
+        queue.add(json);
+
+        while (!queue.isEmpty()) {
+            var element = queue.pop();
+            Collection<JsonElement> add = List.of();
+
+            if (element instanceof JsonObject obj) {
+                var map = obj.asMap();
+                var sorted = new TreeMap<>(map);
+                map.clear();
+                map.putAll(sorted);
+
+                add = sorted.values();
+            } else if (element instanceof JsonArray array) {
+                add = array.asList();
+            }
+
+            add.stream().filter(e -> e.isJsonObject() || e.isJsonArray()).forEach(queue::add);
+        }
+
+        return toInputStream(json.toString());
+    }
+
     public static String hash(File b) {
         try {
             MessageDigest d = MessageDigest.getInstance("SHA-256");
-            DigestInputStream din = new DigestInputStream(new FileInputStream(b), d);
+            DigestInputStream din = new DigestInputStream(readDeterministic(b), d);
             fullTransfer(din, new VoidOutputStream(), 8192);
             din.close();
             return bytesToHex(din.getMessageDigest().digest());

core/src/main/java/com/volmit/iris/util/io/JarScanner.java

@@ -31,16 +31,22 @@ public class JarScanner {
     private final KSet<Class<?>> classes;
     private final File jar;
     private final String superPackage;
+    private final boolean report;
 
     /**
      * Create a scanner
      *
      * @param jar the path to the jar
      */
-    public JarScanner(File jar, String superPackage) {
+    public JarScanner(File jar, String superPackage, boolean report) {
         this.jar = jar;
         this.classes = new KSet<>();
         this.superPackage = superPackage;
+        this.report = report;
+    }
+
+    public JarScanner(File jar, String superPackage) {
+        this(jar, superPackage, true);
     }
 
     /**
@@ -65,7 +71,8 @@ public class JarScanner {
                     try {
                         Class<?> clazz = Class.forName(c);
                         classes.add(clazz);
-                    } catch (ClassNotFoundException e) {
+                    } catch (Throwable e) {
+                        if (!report) continue;
                         Iris.reportError(e);
                         e.printStackTrace();
                     }

core/src/main/java/com/volmit/iris/util/mantle/Mantle.java

@@ -21,14 +21,13 @@ package com.volmit.iris.util.mantle;
 import com.google.common.util.concurrent.AtomicDouble;
 import com.volmit.iris.Iris;
 import com.volmit.iris.core.IrisSettings;
-import com.volmit.iris.core.service.IrisEngineSVC;
 import com.volmit.iris.core.tools.IrisToolbelt;
 import com.volmit.iris.engine.data.cache.Cache;
 import com.volmit.iris.engine.framework.Engine;
 import com.volmit.iris.engine.mantle.EngineMantle;
 import com.volmit.iris.engine.mantle.MantleWriter;
-import com.volmit.iris.util.collection.KList;
 import com.volmit.iris.util.collection.KMap;
+import com.volmit.iris.util.collection.KSet;
 import com.volmit.iris.util.documentation.BlockCoordinates;
 import com.volmit.iris.util.documentation.ChunkCoordinates;
 import com.volmit.iris.util.documentation.RegionCoordinates;
@@ -51,8 +50,6 @@ import java.util.*;
 import java.util.concurrent.*;
 import java.util.concurrent.atomic.AtomicBoolean;
 import java.util.concurrent.atomic.AtomicInteger;
-import java.util.concurrent.atomic.AtomicLong;
-import java.util.concurrent.locks.ReentrantLock;
 
 /**
  * The mantle can store any type of data slice anywhere and manage regions & IO on it's own.
@@ -60,18 +57,18 @@ import java.util.concurrent.locks.ReentrantLock;
  */
 
 public class Mantle {
-    private static final boolean disableClear = System.getProperty("disableClear", "false").equals("true");
     private final File dataFolder;
     @Getter
     private final int worldHeight;
     private final Map<Long, Long> lastUse;
-    @Getter
     private final Map<Long, TectonicPlate> loadedRegions;
     private final HyperLock hyperLock;
     private final AtomicBoolean closed;
     private final MultiBurst ioBurst;
     private final AtomicBoolean ioTrim;
     private final AtomicBoolean ioTectonicUnload;
+    private final AtomicDouble adjustedIdleDuration;
+    private final KSet<Long> toUnload;
 
     /**
      * Create a new mantle
@@ -91,6 +88,8 @@ public class Mantle {
         loadedRegions = new KMap<>();
         lastUse = new KMap<>();
         ioBurst = MultiBurst.burst;
+        adjustedIdleDuration = new AtomicDouble(0);
+        toUnload = new KSet<>();
         Iris.debug("Opened The Mantle " + C.DARK_AQUA + dataFolder.getAbsolutePath());
     }
 
@@ -103,7 +102,7 @@ public class Mantle {
      * @return the file
      */
     public static File fileForRegion(File folder, int x, int z) {
-        return fileForRegion(folder, key(x, z));
+        return fileForRegion(folder, key(x, z), true);
     }
 
     /**
@@ -113,12 +112,28 @@ public class Mantle {
      * @param key    the region key
      * @return the file
      */
-    public static File fileForRegion(File folder, Long key) {
-        File f = new File(folder, "p." + key + ".ttp.lz4b");
-        if (!f.getParentFile().exists()) {
-            f.getParentFile().mkdirs();
+    public static File fileForRegion(File folder, Long key, boolean convert) {
+        File f = oldFileForRegion(folder, key);
+        File fv = new File(folder, "pv." + key + ".ttp.lz4b");
+        if (f.exists() && !fv.exists() && convert)
+            return f;
+
+        if (!fv.getParentFile().exists()) {
+            fv.getParentFile().mkdirs();
         }
-        return f;
+        return fv;
+    }
+
+
+    /**
+     * Get the old file for the given region
+     *
+     * @param folder the data folder
+     * @param key    the region key
+     * @return the file
+     */
+    public static File oldFileForRegion(File folder, Long key) {
+        return new File(folder, "p." + key + ".ttp.lz4b");
     }
 
     /**
@@ -210,7 +225,7 @@ public class Mantle {
     @RegionCoordinates
     public boolean hasTectonicPlate(int x, int z) {
         Long k = key(x, z);
-        return loadedRegions.containsKey(k) || fileForRegion(dataFolder, k).exists();
+        return loadedRegions.containsKey(k) || fileForRegion(dataFolder, k, true).exists();
     }
 
     /**
@@ -359,16 +374,19 @@ public class Mantle {
         }
 
         closed.set(true);
-        BurstExecutor b = ioBurst.burst(loadedRegions.size());
-        for (Long i : loadedRegions.keySet()) {
-            b.queue(() -> {
-                try {
-                    loadedRegions.get(i).write(fileForRegion(dataFolder, i));
-                } catch (IOException e) {
-                    e.printStackTrace();
-                }
-            });
-        }
+        hyperLock.disable();
+        BurstExecutor b = ioBurst.burst(toUnload.size());
+        loadedRegions.forEach((i, plate) -> b.queue(() -> {
+            try {
+                plate.close();
+                plate.write(fileForRegion(dataFolder, i, false));
+                oldFileForRegion(dataFolder, i).delete();
+            } catch (Throwable e) {
+                Iris.error("Failed to write Tectonic Plate " + C.DARK_GREEN + Cache.keyX(i) + " " + Cache.keyZ(i));
+                e.printStackTrace();
+            }
+        }));
+        loadedRegions.clear();
 
         try {
             b.complete();
@@ -376,7 +394,6 @@ public class Mantle {
             Iris.reportError(e);
         }
 
-        loadedRegions.clear();
         Iris.debug("The Mantle has Closed " + C.DARK_AQUA + dataFolder.getAbsolutePath());
     }
 
@@ -392,16 +409,6 @@ public class Mantle {
         return numberOfEntries * bytesPerEntry;
     }
 
-    @Getter
-    private final AtomicDouble adjustedIdleDuration = new AtomicDouble(0);
-    @Getter
-    private final AtomicInteger forceAggressiveThreshold = new AtomicInteger(30);
-    @Getter
-    private final AtomicLong oldestTectonicPlate = new AtomicLong(0);
-    private final ReentrantLock unloadLock = new ReentrantLock();
-    @Getter
-    private final KList<Long> toUnload = new KList<>();
-
     /**
      * Save & unload regions that have not been used for more than the
      * specified amount of milliseconds
@@ -414,93 +421,81 @@ public class Mantle {
         }
 
         adjustedIdleDuration.set(baseIdleDuration);
-
-        if (loadedRegions != null) {
-            if (loadedRegions.size() > tectonicLimit) {
-                // todo update this correctly and maybe do something when its above a 100%
-                adjustedIdleDuration.set(Math.max(adjustedIdleDuration.get() - (1000 * (((loadedRegions.size() - tectonicLimit) / (double) tectonicLimit) * 100) * 0.4), 4000));
-            }
+        if (loadedRegions.size() > tectonicLimit) {
+            // todo update this correctly and maybe do something when its above a 100%
+            adjustedIdleDuration.set(Math.max(adjustedIdleDuration.get() - (1000 * (((loadedRegions.size() - tectonicLimit) / (double) tectonicLimit) * 100) * 0.4), 4000));
         }
 
         ioTrim.set(true);
-        unloadLock.lock();
         try {
-            if (lastUse != null && IrisEngineSVC.instance != null) {
-                if (!lastUse.isEmpty()) {
-                    Iris.debug("Trimming Tectonic Plates older than " + Form.duration(adjustedIdleDuration.get(), 0));
-                    for (long i : new ArrayList<>(lastUse.keySet())) {
-                        double finalAdjustedIdleDuration = adjustedIdleDuration.get();
-                        hyperLock.withLong(i, () -> {
-                            Long lastUseTime = lastUse.get(i);
-                            if (lastUseTime != null && M.ms() - lastUseTime >= finalAdjustedIdleDuration) {
-                                toUnload.add(i);
-                                Iris.debug("Tectonic Region added to unload");
-                                IrisEngineSVC.instance.trimActiveAlive.reset();
-                            }
-                        });
-                    }
-                }
-            }
+            double adjustedIdleDuration = this.adjustedIdleDuration.get();
+            Iris.debug("Trimming Tectonic Plates older than " + Form.duration(adjustedIdleDuration, 0));
 
+            if (lastUse.isEmpty()) return;
+            double unloadTime = M.ms() - adjustedIdleDuration;
+            for (long id : lastUse.keySet()) {
+                hyperLock.withLong(id, () -> {
+                    Long lastUseTime = lastUse.get(id);
+                    if (lastUseTime != null && lastUseTime < unloadTime) {
+                        toUnload.add(id);
+                        Iris.debug("Tectonic Region added to unload");
+                    }
+                });
+            }
         } catch (Throwable e) {
             Iris.reportError(e);
         } finally {
             ioTrim.set(false);
-            unloadLock.unlock();
         }
     }
 
     public synchronized int unloadTectonicPlate(int tectonicLimit) {
+        if (closed.get()) {
+            throw new RuntimeException("The Mantle is closed");
+        }
+
         AtomicInteger i = new AtomicInteger();
-        unloadLock.lock();
-        BurstExecutor burst = null;
-        if (IrisEngineSVC.instance != null) {
-            try {
-                KList<Long> copy = toUnload.copy();
-                if (!disableClear) toUnload.clear();
-                burst = MultiBurst.burst.burst(copy.size());
-                burst.setMulticore(copy.size() > tectonicLimit);
-                for (int j = 0; j < copy.size(); j++) {
-                    Long id = copy.get(j);
-                    if (id == null) {
-                        Iris.error("Null id in unloadTectonicPlate at index " + j);
-                        continue;
+        BurstExecutor burst = ioBurst.burst(toUnload.size());
+        burst.setMulticore(toUnload.size() > tectonicLimit);
+
+        ioTectonicUnload.set(true);
+        try {
+            for (long id : toUnload) {
+                burst.queue(() -> hyperLock.withLong(id, () -> {
+                    TectonicPlate m = loadedRegions.get(id);
+                    if (m == null) {
+                        Iris.debug("Tectonic Plate was added to unload while not loaded " + C.DARK_GREEN + Cache.keyX(id) + " " + Cache.keyZ(id));
+                        toUnload.remove(id);
+                        return;
                     }
 
-                    burst.queue(() ->
-                            hyperLock.withLong(id, () -> {
-                                TectonicPlate m = loadedRegions.get(id);
-                                if (m != null) {
-                                    if (m.inUse()) {
-                                        Iris.debug("Tectonic Plate was added to unload while in use " + C.DARK_GREEN + m.getX() + " " + m.getZ());
-                                        if (disableClear) toUnload.remove(id);
-                                        lastUse.put(id, M.ms());
-                                        return;
-                                    }
-                                    try {
-                                        m.write(fileForRegion(dataFolder, id));
-                                        loadedRegions.remove(id);
-                                        lastUse.remove(id);
-                                        if (disableClear) toUnload.remove(id);
-                                        i.incrementAndGet();
-                                        Iris.debug("Unloaded Tectonic Plate " + C.DARK_GREEN + Cache.keyX(id) + " " + Cache.keyZ(id));
-                                        IrisEngineSVC.instance.unloadActiveAlive.reset();
-                                    } catch (IOException e) {
-                                        Iris.reportError(e);
-                                    }
-                                }
-                            }));
-                }
-                burst.complete();
-            } catch (Throwable e) {
-                e.printStackTrace();
-                if (burst != null)
-                    burst.complete();
-            } finally {
-                unloadLock.unlock();
-                ioTectonicUnload.set(true);
+                    if (m.inUse()) {
+                        Iris.debug("Tectonic Plate was added to unload while in use " + C.DARK_GREEN + m.getX() + " " + m.getZ());
+                        lastUse.put(id, M.ms());
+                        toUnload.remove(id);
+                        return;
+                    }
+
+                    try {
+                        m.write(fileForRegion(dataFolder, id, false));
+                        oldFileForRegion(dataFolder, id).delete();
+                        loadedRegions.remove(id);
+                        lastUse.remove(id);
+                        toUnload.remove(id);
+                        i.incrementAndGet();
+                        Iris.debug("Unloaded Tectonic Plate " + C.DARK_GREEN + Cache.keyX(id) + " " + Cache.keyZ(id));
+                    } catch (IOException e) {
+                        Iris.reportError(e);
+                    }
+                }));
             }
-            return i.get();
+            burst.complete();
+        } catch (Throwable e) {
+            Iris.reportError(e);
+            e.printStackTrace();
+            burst.complete();
+        } finally {
+            ioTectonicUnload.set(false);
         }
         return i.get();
     }
@@ -516,7 +511,7 @@ public class Mantle {
      */
     @RegionCoordinates
     private TectonicPlate get(int x, int z) {
-        if (ioTrim.get()) {
+        if (ioTrim.get() || ioTectonicUnload.get()) {
             try {
                 return getSafe(x, z).get();
             } catch (InterruptedException e) {
@@ -576,7 +571,7 @@ public class Mantle {
             if (file.exists()) {
                 try {
                     Iris.addPanic("reading.tectonic-plate", file.getAbsolutePath());
-                    region = TectonicPlate.read(worldHeight, file);
+                    region = TectonicPlate.read(worldHeight, file, file.getName().startsWith("pv."));
 
                     if (region.getX() != x || region.getZ() != z) {
                         Iris.warn("Loaded Tectonic Plate " + x + "," + z + " but read it as " + region.getX() + "," + region.getZ() + "... Assuming " + x + "," + z);
@@ -626,6 +621,14 @@ public class Mantle {
         return loadedRegions.size();
     }
 
+    public int getUnloadRegionCount() {
+        return toUnload.size();
+    }
+
+    public double getAdjustedIdleDuration() {
+        return adjustedIdleDuration.get();
+    }
+
     public <T> void set(int x, int y, int z, MatterSlice<T> slice) {
         if (slice.isEmpty()) {
             return;

core/src/main/java/com/volmit/iris/util/mantle/MantleChunk.java

@@ -19,6 +19,7 @@
 package com.volmit.iris.util.mantle;
 
 import com.volmit.iris.Iris;
+import com.volmit.iris.util.data.Varint;
 import com.volmit.iris.util.documentation.ChunkCoordinates;
 import com.volmit.iris.util.function.Consumer4;
 import com.volmit.iris.util.io.CountingDataInputStream;
@@ -30,7 +31,8 @@ import lombok.Getter;
 import java.io.ByteArrayOutputStream;
 import java.io.DataOutputStream;
 import java.io.IOException;
-import java.util.concurrent.atomic.AtomicInteger;
+import java.util.concurrent.Semaphore;
+import java.util.concurrent.atomic.AtomicBoolean;
 import java.util.concurrent.atomic.AtomicIntegerArray;
 import java.util.concurrent.atomic.AtomicReferenceArray;
 
@@ -45,7 +47,8 @@ public class MantleChunk {
     private final int z;
     private final AtomicIntegerArray flags;
     private final AtomicReferenceArray<Matter> sections;
-    private final AtomicInteger ref = new AtomicInteger();
+    private final Semaphore ref = new Semaphore(Integer.MAX_VALUE, true);
+    private final AtomicBoolean closed = new AtomicBoolean(false);
 
     /**
      * Create a mantle chunk
@@ -72,11 +75,12 @@ public class MantleChunk {
      * @throws IOException            shit happens
      * @throws ClassNotFoundException shit happens
      */
-    public MantleChunk(int sectionHeight, CountingDataInputStream din) throws IOException {
+    public MantleChunk(int version, int sectionHeight, CountingDataInputStream din) throws IOException {
         this(sectionHeight, din.readByte(), din.readByte());
         int s = din.readByte();
+        int l = version < 0 ? flags.length() : Varint.readUnsignedVarInt(din);
 
-        for (int i = 0; i < flags.length(); i++) {
+        for (int i = 0; i < flags.length() && i < l; i++) {
             flags.set(i, din.readBoolean() ? 1 : 0);
         }
 
@@ -85,6 +89,10 @@ public class MantleChunk {
             long size = din.readInt();
             if (size == 0) continue;
             long start = din.count();
+            if (i >= sectionHeight) {
+                din.skipTo(start + size);
+                continue;
+            }
 
             try {
                 sections.set(i, Matter.readDin(din));
@@ -103,20 +111,27 @@ public class MantleChunk {
         }
     }
 
+    public void close() throws InterruptedException {
+        closed.set(true);
+        ref.acquire(Integer.MAX_VALUE);
+    }
+
     public boolean inUse() {
-        return ref.get() > 0;
+        return ref.availablePermits() < Integer.MAX_VALUE;
     }
 
     public MantleChunk use() {
-        ref.incrementAndGet();
+        if (closed.get()) throw new IllegalStateException("Chunk is closed!");
+        ref.acquireUninterruptibly();
         return this;
     }
 
     public void release() {
-        ref.decrementAndGet();
+        ref.release();
     }
 
     public void flag(MantleFlag flag, boolean f) {
+        if (closed.get()) throw new IllegalStateException("Chunk is closed!");
         flags.set(flag.ordinal(), f ? 1 : 0);
     }
 
@@ -201,6 +216,7 @@ public class MantleChunk {
         dos.writeByte(x);
         dos.writeByte(z);
         dos.writeByte(sections.length());
+        Varint.writeUnsignedVarInt(flags.length(), dos);
 
         for (int i = 0; i < flags.length(); i++) {
             dos.writeBoolean(flags.get(i) == 1);

core/src/main/java/com/volmit/iris/util/mantle/TectonicPlate.java

@@ -19,9 +19,10 @@
 package com.volmit.iris.util.mantle;
 
 import com.volmit.iris.Iris;
+import com.volmit.iris.core.IrisSettings;
 import com.volmit.iris.engine.EnginePanic;
 import com.volmit.iris.engine.data.cache.Cache;
-import com.volmit.iris.util.collection.KSet;
+import com.volmit.iris.util.data.Varint;
 import com.volmit.iris.util.documentation.ChunkCoordinates;
 import com.volmit.iris.util.format.C;
 import com.volmit.iris.util.format.Form;
@@ -44,7 +45,9 @@ import java.util.concurrent.atomic.AtomicReferenceArray;
  * Tectonic Plates are fully atomic & thread safe
  */
 public class TectonicPlate {
-    private static final KSet<Thread> errors = new KSet<>();
+    private static final ThreadLocal<Boolean> errors = ThreadLocal.withInitial(() -> false);
+    public static final int MISSING = -1;
+    public static final int CURRENT = 0;
 
     private final int sectionHeight;
     private final AtomicReferenceArray<MantleChunk> chunks;
@@ -74,11 +77,12 @@ public class TectonicPlate {
      * @param din         the data input
      * @throws IOException            shit happens yo
      */
-    public TectonicPlate(int worldHeight, CountingDataInputStream din) throws IOException {
+    public TectonicPlate(int worldHeight, CountingDataInputStream din, boolean versioned) throws IOException {
         this(worldHeight, din.readInt(), din.readInt());
         if (!din.markSupported())
             throw new IOException("Mark not supported!");
 
+        int v = versioned ? Varint.readUnsignedVarInt(din) : MISSING;
         for (int i = 0; i < chunks.length(); i++) {
             long size = din.readInt();
             if (size == 0) continue;
@@ -86,7 +90,7 @@ public class TectonicPlate {
 
             try {
                 Iris.addPanic("read-chunk", "Chunk[" + i + "]");
-                chunks.set(i, new MantleChunk(sectionHeight, din));
+                chunks.set(i, new MantleChunk(v, sectionHeight, din));
                 EnginePanic.saveLast();
             } catch (Throwable e) {
                 long end = start + size;
@@ -103,7 +107,7 @@ public class TectonicPlate {
         }
     }
 
-    public static TectonicPlate read(int worldHeight, File file) throws IOException {
+    public static TectonicPlate read(int worldHeight, File file, boolean versioned) throws IOException {
         try (FileChannel fc = FileChannel.open(file.toPath(), StandardOpenOption.READ, StandardOpenOption.WRITE, StandardOpenOption.SYNC)) {
             fc.lock();
 
@@ -111,10 +115,10 @@ public class TectonicPlate {
             LZ4BlockInputStream lz4 = new LZ4BlockInputStream(fin);
             BufferedInputStream bis = new BufferedInputStream(lz4);
             try (CountingDataInputStream din = CountingDataInputStream.wrap(bis)) {
-                return new TectonicPlate(worldHeight, din);
+                return new TectonicPlate(worldHeight, din, versioned);
             }
         } finally {
-            if (errors.remove(Thread.currentThread())) {
+            if (IrisSettings.get().getGeneral().isDumpMantleOnError() && errors.get()) {
                 File dump = Iris.instance.getDataFolder("dump", file.getName() + ".bin");
                 try (FileChannel fc = FileChannel.open(file.toPath(), StandardOpenOption.READ, StandardOpenOption.WRITE, StandardOpenOption.SYNC)) {
                     fc.lock();
@@ -124,6 +128,7 @@ public class TectonicPlate {
                     Files.copy(lz4, dump.toPath(), StandardCopyOption.REPLACE_EXISTING);
                 }
             }
+            errors.remove();
         }
     }
 
@@ -136,6 +141,15 @@ public class TectonicPlate {
         return false;
     }
 
+    public void close() throws InterruptedException {
+        for (int i = 0; i < chunks.length(); i++) {
+            MantleChunk chunk = chunks.get(i);
+            if (chunk != null) {
+                chunk.close();
+            }
+        }
+    }
+
     /**
      * Check if a chunk exists in this plate or not (same as get(x, z) != null)
      *
@@ -208,15 +222,13 @@ public class TectonicPlate {
      */
     public void write(File file) throws IOException {
         PrecisionStopwatch p = PrecisionStopwatch.start();
-        try (FileChannel fc = FileChannel.open(file.toPath(), StandardOpenOption.READ, StandardOpenOption.WRITE, StandardOpenOption.CREATE, StandardOpenOption.TRUNCATE_EXISTING, StandardOpenOption.SYNC)) {
-            fc.lock();
-
-            OutputStream fos = Channels.newOutputStream(fc);
-            try (DataOutputStream dos = new DataOutputStream(new LZ4BlockOutputStream(fos))) {
-                write(dos);
-                Iris.debug("Saved Tectonic Plate " + C.DARK_GREEN + file.getName().split("\\Q.\\E")[0] + C.RED + " in " + Form.duration(p.getMilliseconds(), 2));
-            }
+        File temp = File.createTempFile("iris-tectonic-plate", ".bin");
+        try (DataOutputStream dos = new DataOutputStream(new LZ4BlockOutputStream(new FileOutputStream(temp)))) {
+            write(dos);
         }
+        Files.move(temp.toPath(), file.toPath(), StandardCopyOption.REPLACE_EXISTING, StandardCopyOption.ATOMIC_MOVE);
+        Iris.debug("Saved Tectonic Plate " + C.DARK_GREEN + file.getName() + C.RED + " in " + Form.duration(p.getMilliseconds(), 2));
+        temp.delete();
     }
 
     /**
@@ -228,6 +240,7 @@ public class TectonicPlate {
     public void write(DataOutputStream dos) throws IOException {
         dos.writeInt(x);
         dos.writeInt(z);
+        Varint.writeUnsignedVarInt(CURRENT, dos);
 
         var bytes = new ByteArrayOutputStream(8192);
         var sub = new DataOutputStream(bytes);
@@ -249,6 +262,6 @@ public class TectonicPlate {
     }
 
     public static void addError() {
-        errors.add(Thread.currentThread());
+        errors.set(true);
     }
 }

core/src/main/java/com/volmit/iris/util/matter/Matter.java

@@ -154,15 +154,16 @@ public interface Matter {
                 matter.putSlice(type, slice);
             } catch (Throwable e) {
                 long end = start + size;
-                Iris.error("Failed to read matter slice, skipping it.");
-                Iris.addPanic("read.byte.range", start + " " + end);
-                Iris.addPanic("read.byte.current", din.count() + "");
-                Iris.reportError(e);
-                e.printStackTrace();
-                Iris.panic();
-
+                if (!(e instanceof ClassNotFoundException)) {
+                    Iris.error("Failed to read matter slice, skipping it.");
+                    Iris.addPanic("read.byte.range", start + " " + end);
+                    Iris.addPanic("read.byte.current", din.count() + "");
+                    Iris.reportError(e);
+                    e.printStackTrace();
+                    Iris.panic();
+                    TectonicPlate.addError();
+                }
                 din.skipTo(end);
-                TectonicPlate.addError();
             }
         }
 

core/src/main/java/com/volmit/iris/util/misc/Hastebin.java

@@ -1,135 +0,0 @@
-package com.volmit.iris.util.misc;
-
-import com.volmit.iris.Iris;
-import com.volmit.iris.core.tools.IrisToolbelt;
-import com.volmit.iris.engine.framework.Engine;
-import com.volmit.iris.util.collection.KList;
-import com.volmit.iris.util.format.C;
-import com.volmit.iris.util.format.Form;
-import net.md_5.bungee.api.chat.ClickEvent;
-import net.md_5.bungee.api.chat.TextComponent;
-import org.bukkit.Bukkit;
-import org.bukkit.World;
-import org.bukkit.command.CommandSender;
-import oshi.SystemInfo;
-
-import java.io.BufferedReader;
-import java.io.DataOutputStream;
-import java.io.File;
-import java.io.InputStreamReader;
-import java.net.HttpURLConnection;
-import java.net.URL;
-import java.nio.file.Files;
-import java.util.List;
-
-public class Hastebin {
-
-    public static void enviornment(CommandSender sender) {
-        // Construct the server information
-        StringBuilder sb = new StringBuilder();
-        SystemInfo systemInfo = new SystemInfo();
-        KList<String> disks = new KList<>(getHardware.getDisk());
-        KList<String> interfaces = new KList<>(getHardware.getInterfaces());
-        KList<String> displays = new KList<>(getHardware.getEDID());
-        KList<String> sensors = new KList<>(getHardware.getSensors());
-        KList<String> gpus = new KList<>(getHardware.getGraphicsCards());
-        KList<String> powersources = new KList<>(getHardware.getPowerSources());
-
-        KList<World> IrisWorlds = new KList<>();
-        KList<World> BukkitWorlds = new KList<>();
-
-        for (World w : Bukkit.getServer().getWorlds()) {
-            try {
-                Engine engine = IrisToolbelt.access(w).getEngine();
-                if (engine != null) {
-                    IrisWorlds.add(w);
-                }
-            } catch (Exception e) {
-                BukkitWorlds.add(w);
-            }
-        }
-
-        sb.append(" -- == Iris Info == -- \n");
-        sb.append("Iris Version Version: ").append(Iris.instance.getDescription().getVersion()).append("\n");
-        sb.append("- Iris Worlds");
-        for (World w : IrisWorlds.copy()) {
-            sb.append(" - ").append(w.getName());
-        }
-        sb.append("- Bukkit Worlds");
-        for (World w : BukkitWorlds.copy()) {
-            sb.append(" - ").append(w.getName());
-        }
-        sb.append(" -- == Platform Overview == -- " + "\n");
-        sb.append("Server Type: ").append(Bukkit.getVersion()).append("\n");
-        sb.append("Server Uptime: ").append(Form.stampTime(systemInfo.getOperatingSystem().getSystemUptime())).append("\n");
-        sb.append("Version: ").append(Platform.getVersion()).append(" - Platform: ").append(Platform.getName()).append("\n");
-        sb.append("Java Vendor: ").append(Platform.ENVIRONMENT.getJavaVendor()).append(" - Java Version: ").append(Platform.ENVIRONMENT.getJavaVersion()).append("\n");
-        sb.append(" -- == Processor Overview == -- " + "\n");
-        sb.append("CPU Model: ").append(getHardware.getCPUModel());
-        sb.append("CPU Architecture: ").append(Platform.CPU.getArchitecture()).append(" Available Processors: ").append(Platform.CPU.getAvailableProcessors()).append("\n");
-        sb.append("CPU Load: ").append(Form.pc(Platform.CPU.getCPULoad())).append(" CPU Live Process Load: ").append(Form.pc(Platform.CPU.getLiveProcessCPULoad())).append("\n");
-        sb.append("-=" + " Graphics " + "=- " + "\n");
-        for (String gpu : gpus) {
-            sb.append(" ").append(gpu).append("\n");
-        }
-        sb.append(" -- == Memory Information == -- " + "\n");
-        sb.append("Physical Memory - Total: ").append(Form.memSize(Platform.MEMORY.PHYSICAL.getTotalMemory())).append(" Free: ").append(Form.memSize(Platform.MEMORY.PHYSICAL.getFreeMemory())).append(" Used: ").append(Form.memSize(Platform.MEMORY.PHYSICAL.getUsedMemory())).append("\n");
-        sb.append("Virtual Memory - Total: ").append(Form.memSize(Platform.MEMORY.VIRTUAL.getTotalMemory())).append(" Free: ").append(Form.memSize(Platform.MEMORY.VIRTUAL.getFreeMemory())).append(" Used: ").append(Form.memSize(Platform.MEMORY.VIRTUAL.getUsedMemory())).append("\n");
-        sb.append(" -- == Storage Information == -- " + "\n");
-        for (String disk : disks) {
-            sb.append(" ").append(sb.append(disk)).append("\n");
-        }
-        sb.append(" -- == Interface Information == -- "+ "\n" );
-        for (String inter : interfaces) {
-            sb.append(" ").append(inter).append("\n");
-        }
-        sb.append(" -- == Display Information == -- "+ "\n" );
-        for (String display : displays) {
-            sb.append(display).append("\n");
-        }
-        sb.append(" -- == Sensor Information == -- " + "\n");
-        for (String sensor : sensors) {
-            sb.append(" ").append(sensor).append("\n");
-        }
-        sb.append(" -- == Power Information == -- " + "\n");
-        for (String power : powersources) {
-            sb.append(" ").append(power).append("\n");
-        }
-
-        try {
-            String hastebinUrl = uploadToHastebin(sb.toString());
-
-            // Create the clickable message
-            TextComponent message = new TextComponent("[Link]");
-            TextComponent link = new TextComponent(hastebinUrl);
-            link.setClickEvent(new ClickEvent(ClickEvent.Action.OPEN_URL, hastebinUrl));
-            message.addExtra(link);
-
-            // Send the clickable message to the player
-            sender.spigot().sendMessage(message);
-        } catch (Exception e) {
-            sender.sendMessage(C.DARK_RED + "Failed to upload server information to Hastebin.");
-        }
-    }
-
-    private static String uploadToHastebin(String content) throws Exception {
-        URL url = new URL("https://paste.bytecode.ninja/documents");
-        HttpURLConnection conn = (HttpURLConnection) url.openConnection();
-        conn.setRequestMethod("POST");
-        conn.setRequestProperty("Content-Type", "text/plain");
-        conn.setDoOutput(true);
-
-        DataOutputStream wr = new DataOutputStream(conn.getOutputStream());
-        wr.writeBytes(content);
-        wr.flush();
-        wr.close();
-
-        BufferedReader br = new BufferedReader(new InputStreamReader(conn.getInputStream()));
-        String response = br.readLine();
-        br.close();
-
-        return "https://paste.bytecode.ninja/" + response.split("\"")[3];
-    }
-
-
-}

core/src/main/java/com/volmit/iris/util/misc/Platform.java

@@ -1,145 +0,0 @@
-package com.volmit.iris.util.misc;
-
-import com.sun.management.OperatingSystemMXBean;
-
-import java.io.File;
-import java.lang.management.ManagementFactory;
-
-@SuppressWarnings("restriction")
-public class Platform {
-    public static String getVersion() {
-        return getSystem().getVersion();
-    }
-
-    public static String getName() {
-        return getSystem().getName();
-    }
-
-    private static OperatingSystemMXBean getSystem() {
-        return (OperatingSystemMXBean) ManagementFactory.getOperatingSystemMXBean();
-    }
-
-    public static class ENVIRONMENT {
-        public static boolean canRunBatch() {
-            return getSystem().getName().toLowerCase().contains("windows");
-        }
-
-        public static String getJavaHome() {
-            return System.getProperty("java.home");
-        }
-
-        public static String getJavaVendor() {
-            return System.getProperty("java.vendor");
-        }
-
-        public static String getJavaVersion() {
-            return System.getProperty("java.version");
-        }
-    }
-
-    public static class STORAGE {
-        public static long getAbsoluteTotalSpace() {
-            long t = 0;
-
-            for (File i : getRoots()) {
-                t += getTotalSpace(i);
-            }
-
-            return t;
-        }
-
-        public static long getTotalSpace() {
-            return getTotalSpace(new File("."));
-        }
-
-        public static long getTotalSpace(File root) {
-            return root.getTotalSpace();
-        }
-
-        public static long getAbsoluteFreeSpace() {
-            long t = 0;
-
-            for (File i : getRoots()) {
-                t += getFreeSpace(i);
-            }
-
-            return t;
-        }
-
-        public static long getFreeSpace() {
-            return getFreeSpace(new File("."));
-        }
-
-        public static long getFreeSpace(File root) {
-            return root.getFreeSpace();
-        }
-
-        public static long getUsedSpace() {
-            return getTotalSpace() - getFreeSpace();
-        }
-
-        public static long getUsedSpace(File root) {
-            return getTotalSpace(root) - getFreeSpace(root);
-        }
-
-        public static long getAbsoluteUsedSpace() {
-            return getAbsoluteTotalSpace() - getAbsoluteFreeSpace();
-        }
-
-        public static File[] getRoots() {
-            return File.listRoots();
-        }
-    }
-
-    public static class MEMORY {
-        public static class PHYSICAL {
-            public static long getTotalMemory() {
-                return getSystem().getTotalPhysicalMemorySize();
-            }
-
-            public static long getFreeMemory() {
-                return getSystem().getFreePhysicalMemorySize();
-            }
-
-            public static long getUsedMemory() {
-                return getTotalMemory() - getFreeMemory();
-            }
-        }
-
-        public static class VIRTUAL {
-            public static long getTotalMemory() {
-                return getSystem().getTotalSwapSpaceSize();
-            }
-
-            public static long getFreeMemory() {
-                return getSystem().getFreeSwapSpaceSize();
-            }
-
-            public static long getUsedMemory() {
-                return getTotalMemory() - getFreeMemory();
-            }
-
-            public static long getCommittedVirtualMemory() {
-                return getSystem().getCommittedVirtualMemorySize();
-            }
-        }
-    }
-
-    public static class CPU {
-        public static int getAvailableProcessors() {
-            return getSystem().getAvailableProcessors();
-        }
-
-        public static double getCPULoad() {
-            return getSystem().getSystemCpuLoad();
-        }
-
-        public static double getLiveProcessCPULoad() {
-            return getSystem().getProcessCpuLoad();
-        }
-
-        public static String getArchitecture() {
-            return getSystem().getArch();
-        }
-    }
-}

core/src/main/java/com/volmit/iris/util/parallel/HyperLock.java

@@ -143,5 +143,6 @@ public class HyperLock {
 
     public void disable() {
         enabled = false;
+        locks.values().forEach(ReentrantLock::lock);
     }
 }

core/src/main/java/com/volmit/iris/util/parallel/MultiBurst.java

@@ -24,12 +24,15 @@ import com.volmit.iris.core.service.PreservationSVC;
 import com.volmit.iris.util.collection.KList;
 import com.volmit.iris.util.math.M;
 import com.volmit.iris.util.scheduling.PrecisionStopwatch;
+import org.jetbrains.annotations.NotNull;
 
+import java.util.Collection;
 import java.util.List;
 import java.util.concurrent.*;
 import java.util.concurrent.atomic.AtomicLong;
 
-public class MultiBurst {
+public class MultiBurst implements ExecutorService {
+    private static final long TIMEOUT = Long.getLong("iris.burst.timeout", 15000);
     public static final MultiBurst burst = new MultiBurst();
     private final AtomicLong last;
     private final String name;
@@ -144,29 +147,106 @@ public class MultiBurst {
         return getService().submit(o);
     }
 
+    @Override
+    public void shutdown() {
+        close();
+    }
+
+    @NotNull
+    @Override
+    public List<Runnable> shutdownNow() {
+        close();
+        return List.of();
+    }
+
+    @Override
+    public boolean isShutdown() {
+        return service == null || service.isShutdown();
+    }
+
+    @Override
+    public boolean isTerminated() {
+        return service == null || service.isTerminated();
+    }
+
+    @Override
+    public boolean awaitTermination(long timeout, @NotNull TimeUnit unit) throws InterruptedException {
+        return service == null || service.awaitTermination(timeout, unit);
+    }
+
+    @Override
+    public void execute(@NotNull Runnable command) {
+        getService().execute(command);
+    }
+
+    @NotNull
+    @Override
+    public <T> Future<T> submit(@NotNull Callable<T> task) {
+        return getService().submit(task);
+    }
+
+    @NotNull
+    @Override
+    public <T> Future<T> submit(@NotNull Runnable task, T result) {
+        return getService().submit(task, result);
+    }
+
+    @NotNull
+    @Override
+    public Future<?> submit(@NotNull Runnable task) {
+        return getService().submit(task);
+    }
+
+    @NotNull
+    @Override
+    public <T> List<Future<T>> invokeAll(@NotNull Collection<? extends Callable<T>> tasks) throws InterruptedException {
+        return getService().invokeAll(tasks);
+    }
+
+    @NotNull
+    @Override
+    public <T> List<Future<T>> invokeAll(@NotNull Collection<? extends Callable<T>> tasks, long timeout, @NotNull TimeUnit unit) throws InterruptedException {
+        return getService().invokeAll(tasks, timeout, unit);
+    }
+
+    @NotNull
+    @Override
+    public <T> T invokeAny(@NotNull Collection<? extends Callable<T>> tasks) throws InterruptedException, ExecutionException {
+        return getService().invokeAny(tasks);
+    }
+
+    @Override
+    public <T> T invokeAny(@NotNull Collection<? extends Callable<T>> tasks, long timeout, @NotNull TimeUnit unit) throws InterruptedException, ExecutionException, TimeoutException {
+        return getService().invokeAny(tasks, timeout, unit);
+    }
+
     public void close() {
         if (service != null) {
-            service.shutdown();
-            PrecisionStopwatch p = PrecisionStopwatch.start();
-            try {
-                while (!service.awaitTermination(1, TimeUnit.SECONDS)) {
-                    Iris.info("Still waiting to shutdown burster...");
-                    if (p.getMilliseconds() > 7000) {
-                        Iris.warn("Forcing Shutdown...");
+            close(service);
+        }
+    }
 
-                        try {
-                            service.shutdownNow();
-                        } catch (Throwable e) {
+    public static void close(ExecutorService service) {
+        service.shutdown();
+        PrecisionStopwatch p = PrecisionStopwatch.start();
+        try {
+            while (!service.awaitTermination(1, TimeUnit.SECONDS)) {
+                Iris.info("Still waiting to shutdown burster...");
+                if (p.getMilliseconds() > TIMEOUT) {
+                    Iris.warn("Forcing Shutdown...");
 
-                        }
+                    try {
+                        service.shutdownNow();
+                    } catch (Throwable e) {
 
-                        break;
                     }
+
+                    break;
                 }
-            } catch (Throwable e) {
-                e.printStackTrace();
-                Iris.reportError(e);
             }
+        } catch (Throwable e) {
+            e.printStackTrace();
+            Iris.reportError(e);
         }
     }
 }

nms/v1_20_R1/src/main/java/com/volmit/iris/core/nms/v1_20_R1/IrisChunkGenerator.java

@@ -23,6 +23,7 @@ import net.minecraft.resources.ResourceKey;
 import net.minecraft.resources.ResourceLocation;
 import net.minecraft.server.level.ServerLevel;
 import net.minecraft.server.level.WorldGenRegion;
+import net.minecraft.tags.StructureTags;
 import net.minecraft.tags.TagKey;
 import net.minecraft.util.random.WeightedRandomList;
 import net.minecraft.world.entity.MobCategory;
@@ -122,6 +123,11 @@ public class IrisChunkGenerator extends CustomChunkGenerator {
 
     @Override
     public @Nullable Pair<BlockPos, Holder<Structure>> findNearestMapStructure(ServerLevel level, HolderSet<Structure> holders, BlockPos pos, int radius, boolean findUnexplored) {
+        if (holders.size() == 0) return null;
+        if (holders.unwrapKey().orElse(null) == StructureTags.EYE_OF_ENDER_LOCATED) {
+            var next = engine.getNearestStronghold(new Position2(pos.getX(), pos.getZ()));
+            return next == null ? null : new Pair<>(new BlockPos(next.getX(), 0, next.getZ()), holders.get(0));
+        }
         if (engine.getDimension().isDisableExplorerMaps())
             return null;
 

nms/v1_20_R1/src/main/java/com/volmit/iris/core/nms/v1_20_R1/NMSBinding.java

@@ -645,37 +645,44 @@ public class NMSBinding implements INMSBinding {
     }
 
     @Override
+    @SneakyThrows
     public AutoClosing injectLevelStems() {
-        return inject(this::supplier);
+        if (!dataContextLock.tryLock()) throw new IllegalStateException("Failed to inject data context!");
+
+        var server = ((CraftServer) Bukkit.getServer());
+        var field = getField(MinecraftServer.class, WorldLoader.DataLoadContext.class);
+        var nmsServer = server.getServer();
+        var old = nmsServer.worldLoader;
+
+        field.setAccessible(true);
+        field.set(nmsServer, dataLoadContext.aquire(() -> new WorldLoader.DataLoadContext(
+                old.resources(),
+                old.dataConfiguration(),
+                old.datapackWorldgen(),
+                createRegistryAccess(old.datapackDimensions(), false, true, true, true)
+        )));
+
+        return new AutoClosing(() -> {
+            field.set(nmsServer, old);
+            dataContextLock.unlock();
+        });
     }
 
     @Override
     @SneakyThrows
-    public com.volmit.iris.core.nms.container.Pair<Integer, AutoClosing> injectUncached(boolean overworld, boolean nether, boolean end) {
+    public AutoClosing injectUncached(boolean overworld, boolean nether, boolean end) {
         var reg = registry();
         var field = getField(RegistryAccess.ImmutableRegistryAccess.class, Map.class);
         field.setAccessible(true);
 
-        AutoClosing closing = inject(old -> new WorldLoader.DataLoadContext(
-                        old.resources(),
-                        old.dataConfiguration(),
-                        old.datapackWorldgen(),
-                        createRegistryAccess(old.datapackDimensions(), true, overworld, nether, end)
-                )
-        );
-
-        var injected = ((CraftServer) Bukkit.getServer()).getServer().worldLoader.datapackDimensions().registryOrThrow(Registries.LEVEL_STEM);
+        var access = createRegistryAccess(((CraftServer) Bukkit.getServer()).getServer().worldLoader.datapackDimensions(), true, overworld, nether, end);
+        var injected = access.registryOrThrow(Registries.LEVEL_STEM);
         var old = (Map<ResourceKey<? extends Registry<?>>, Registry<?>>) field.get(reg);
         var fake = new HashMap<>(old);
         fake.put(Registries.LEVEL_STEM, injected);
         field.set(reg, fake);
 
-        return new com.volmit.iris.core.nms.container.Pair<>(
-                injected.size(),
-                new AutoClosing(() -> {
-                    closing.close();
-                    field.set(reg, old);
-                }));
+        return new AutoClosing(() -> field.set(reg, old));
     }
 
     @Override
@@ -687,31 +694,9 @@ public class NMSBinding implements INMSBinding {
         return overworld || nether || end;
     }
 
-    private WorldLoader.DataLoadContext supplier(WorldLoader.DataLoadContext old) {
-        return dataLoadContext.aquire(() -> new WorldLoader.DataLoadContext(
-                old.resources(),
-                old.dataConfiguration(),
-                old.datapackWorldgen(),
-                createRegistryAccess(old.datapackDimensions(), false, true, true, true)
-        ));
-    }
-
-    @SneakyThrows
-    private AutoClosing inject(Function<WorldLoader.DataLoadContext, WorldLoader.DataLoadContext> transformer) {
-        if (!dataContextLock.tryLock()) throw new IllegalStateException("Failed to inject data context!");
-
-        var server = ((CraftServer) Bukkit.getServer());
-        var field = getField(MinecraftServer.class, WorldLoader.DataLoadContext.class);
-        var nmsServer = server.getServer();
-        var old = nmsServer.worldLoader;
-
-        field.setAccessible(true);
-        field.set(nmsServer, transformer.apply(old));
-
-        return new AutoClosing(() -> {
-            field.set(nmsServer, old);
-            dataContextLock.unlock();
-        });
+    @Override
+    public void removeCustomDimensions(World world) {
+        ((CraftWorld) world).getHandle().K.customDimensions = null;
     }
 
     private RegistryAccess.Frozen createRegistryAccess(RegistryAccess.Frozen datapack, boolean copy, boolean overworld, boolean nether, boolean end) {
@@ -735,7 +720,7 @@ public class NMSBinding implements INMSBinding {
 
         if (copy) copy(fake, access.registryOrThrow(Registries.LEVEL_STEM));
 
-        return new RegistryAccess.Frozen.ImmutableRegistryAccess(List.of(fake.freeze())).freeze();
+        return new RegistryAccess.Frozen.ImmutableRegistryAccess(List.of(fake)).freeze();
     }
 
     private void register(MappedRegistry<LevelStem> target, Registry<DimensionType> dimensions, FlatLevelSource source, ResourceKey<LevelStem> key) {

nms/v1_20_R2/src/main/java/com/volmit/iris/core/nms/v1_20_R2/IrisChunkGenerator.java

@@ -23,6 +23,7 @@ import net.minecraft.resources.ResourceKey;
 import net.minecraft.resources.ResourceLocation;
 import net.minecraft.server.level.ServerLevel;
 import net.minecraft.server.level.WorldGenRegion;
+import net.minecraft.tags.StructureTags;
 import net.minecraft.tags.TagKey;
 import net.minecraft.util.random.WeightedRandomList;
 import net.minecraft.world.entity.MobCategory;
@@ -122,6 +123,11 @@ public class IrisChunkGenerator extends CustomChunkGenerator {
 
     @Override
     public @Nullable Pair<BlockPos, Holder<Structure>> findNearestMapStructure(ServerLevel level, HolderSet<Structure> holders, BlockPos pos, int radius, boolean findUnexplored) {
+        if (holders.size() == 0) return null;
+        if (holders.unwrapKey().orElse(null) == StructureTags.EYE_OF_ENDER_LOCATED) {
+            var next = engine.getNearestStronghold(new Position2(pos.getX(), pos.getZ()));
+            return next == null ? null : new Pair<>(new BlockPos(next.getX(), 0, next.getZ()), holders.get(0));
+        }
         if (engine.getDimension().isDisableExplorerMaps())
             return null;
 

nms/v1_20_R2/src/main/java/com/volmit/iris/core/nms/v1_20_R2/NMSBinding.java

@@ -646,37 +646,44 @@ public class NMSBinding implements INMSBinding {
     }
 
     @Override
+    @SneakyThrows
     public AutoClosing injectLevelStems() {
-        return inject(this::supplier);
+        if (!dataContextLock.tryLock()) throw new IllegalStateException("Failed to inject data context!");
+
+        var server = ((CraftServer) Bukkit.getServer());
+        var field = getField(MinecraftServer.class, WorldLoader.DataLoadContext.class);
+        var nmsServer = server.getServer();
+        var old = nmsServer.worldLoader;
+
+        field.setAccessible(true);
+        field.set(nmsServer, dataLoadContext.aquire(() -> new WorldLoader.DataLoadContext(
+                old.resources(),
+                old.dataConfiguration(),
+                old.datapackWorldgen(),
+                createRegistryAccess(old.datapackDimensions(), false, true, true, true)
+        )));
+
+        return new AutoClosing(() -> {
+            field.set(nmsServer, old);
+            dataContextLock.unlock();
+        });
     }
 
     @Override
     @SneakyThrows
-    public com.volmit.iris.core.nms.container.Pair<Integer, AutoClosing> injectUncached(boolean overworld, boolean nether, boolean end) {
+    public AutoClosing injectUncached(boolean overworld, boolean nether, boolean end) {
         var reg = registry();
         var field = getField(RegistryAccess.ImmutableRegistryAccess.class, Map.class);
         field.setAccessible(true);
 
-        AutoClosing closing = inject(old -> new WorldLoader.DataLoadContext(
-                        old.resources(),
-                        old.dataConfiguration(),
-                        old.datapackWorldgen(),
-                        createRegistryAccess(old.datapackDimensions(), true, overworld, nether, end)
-                )
-        );
-
-        var injected = ((CraftServer) Bukkit.getServer()).getServer().worldLoader.datapackDimensions().registryOrThrow(Registries.LEVEL_STEM);
+        var access = createRegistryAccess(((CraftServer) Bukkit.getServer()).getServer().worldLoader.datapackDimensions(), true, overworld, nether, end);
+        var injected = access.registryOrThrow(Registries.LEVEL_STEM);
         var old = (Map<ResourceKey<? extends Registry<?>>, Registry<?>>) field.get(reg);
         var fake = new HashMap<>(old);
         fake.put(Registries.LEVEL_STEM, injected);
         field.set(reg, fake);
 
-        return new com.volmit.iris.core.nms.container.Pair<>(
-                injected.size(),
-                new AutoClosing(() -> {
-                    closing.close();
-                    field.set(reg, old);
-                }));
+        return new AutoClosing(() -> field.set(reg, old));
     }
 
     @Override
@@ -688,31 +695,9 @@ public class NMSBinding implements INMSBinding {
         return overworld || nether || end;
     }
 
-    private WorldLoader.DataLoadContext supplier(WorldLoader.DataLoadContext old) {
-        return dataLoadContext.aquire(() -> new WorldLoader.DataLoadContext(
-                old.resources(),
-                old.dataConfiguration(),
-                old.datapackWorldgen(),
-                createRegistryAccess(old.datapackDimensions(), false, true, true, true)
-        ));
-    }
-
-    @SneakyThrows
-    private AutoClosing inject(Function<WorldLoader.DataLoadContext, WorldLoader.DataLoadContext> transformer) {
-        if (!dataContextLock.tryLock()) throw new IllegalStateException("Failed to inject data context!");
-
-        var server = ((CraftServer) Bukkit.getServer());
-        var field = getField(MinecraftServer.class, WorldLoader.DataLoadContext.class);
-        var nmsServer = server.getServer();
-        var old = nmsServer.worldLoader;
-
-        field.setAccessible(true);
-        field.set(nmsServer, transformer.apply(old));
-
-        return new AutoClosing(() -> {
-            field.set(nmsServer, old);
-            dataContextLock.unlock();
-        });
+    @Override
+    public void removeCustomDimensions(World world) {
+        ((CraftWorld) world).getHandle().K.customDimensions = null;
     }
 
     private RegistryAccess.Frozen createRegistryAccess(RegistryAccess.Frozen datapack, boolean copy, boolean overworld, boolean nether, boolean end) {
@@ -736,7 +721,7 @@ public class NMSBinding implements INMSBinding {
 
         if (copy) copy(fake, access.registryOrThrow(Registries.LEVEL_STEM));
 
-        return new RegistryAccess.Frozen.ImmutableRegistryAccess(List.of(fake.freeze())).freeze();
+        return new RegistryAccess.Frozen.ImmutableRegistryAccess(List.of(fake)).freeze();
     }
 
     private void register(MappedRegistry<LevelStem> target, Registry<DimensionType> dimensions, FlatLevelSource source, ResourceKey<LevelStem> key) {

nms/v1_20_R3/src/main/java/com/volmit/iris/core/nms/v1_20_R3/IrisChunkGenerator.java

@@ -125,6 +125,11 @@ public class IrisChunkGenerator extends CustomChunkGenerator {
 
     @Override
     public @Nullable Pair<BlockPos, Holder<Structure>> findNearestMapStructure(ServerLevel level, HolderSet<Structure> holders, BlockPos pos, int radius, boolean findUnexplored) {
+        if (holders.size() == 0) return null;
+        if (holders.unwrapKey().orElse(null) == StructureTags.EYE_OF_ENDER_LOCATED) {
+            var next = engine.getNearestStronghold(new Position2(pos.getX(), pos.getZ()));
+            return next == null ? null : new Pair<>(new BlockPos(next.getX(), 0, next.getZ()), holders.get(0));
+        }
         if (engine.getDimension().isDisableExplorerMaps())
             return null;
 

nms/v1_20_R3/src/main/java/com/volmit/iris/core/nms/v1_20_R3/NMSBinding.java

@@ -647,37 +647,44 @@ public class NMSBinding implements INMSBinding {
     }
 
     @Override
+    @SneakyThrows
     public AutoClosing injectLevelStems() {
-        return inject(this::supplier);
+        if (!dataContextLock.tryLock()) throw new IllegalStateException("Failed to inject data context!");
+
+        var server = ((CraftServer) Bukkit.getServer());
+        var field = getField(MinecraftServer.class, WorldLoader.DataLoadContext.class);
+        var nmsServer = server.getServer();
+        var old = nmsServer.worldLoader;
+
+        field.setAccessible(true);
+        field.set(nmsServer, dataLoadContext.aquire(() -> new WorldLoader.DataLoadContext(
+                old.resources(),
+                old.dataConfiguration(),
+                old.datapackWorldgen(),
+                createRegistryAccess(old.datapackDimensions(), false, true, true, true)
+        )));
+
+        return new AutoClosing(() -> {
+            field.set(nmsServer, old);
+            dataContextLock.unlock();
+        });
     }
 
     @Override
     @SneakyThrows
-    public com.volmit.iris.core.nms.container.Pair<Integer, AutoClosing> injectUncached(boolean overworld, boolean nether, boolean end) {
+    public AutoClosing injectUncached(boolean overworld, boolean nether, boolean end) {
         var reg = registry();
         var field = getField(RegistryAccess.ImmutableRegistryAccess.class, Map.class);
         field.setAccessible(true);
 
-        AutoClosing closing = inject(old -> new WorldLoader.DataLoadContext(
-                        old.resources(),
-                        old.dataConfiguration(),
-                        old.datapackWorldgen(),
-                        createRegistryAccess(old.datapackDimensions(), true, overworld, nether, end)
-                )
-        );
-
-        var injected = ((CraftServer) Bukkit.getServer()).getServer().worldLoader.datapackDimensions().registryOrThrow(Registries.LEVEL_STEM);
+        var access = createRegistryAccess(((CraftServer) Bukkit.getServer()).getServer().worldLoader.datapackDimensions(), true, overworld, nether, end);
+        var injected = access.registryOrThrow(Registries.LEVEL_STEM);
         var old = (Map<ResourceKey<? extends Registry<?>>, Registry<?>>) field.get(reg);
         var fake = new HashMap<>(old);
         fake.put(Registries.LEVEL_STEM, injected);
         field.set(reg, fake);
 
-        return new com.volmit.iris.core.nms.container.Pair<>(
-                injected.size(),
-                new AutoClosing(() -> {
-                    closing.close();
-                    field.set(reg, old);
-                }));
+        return new AutoClosing(() -> field.set(reg, old));
     }
 
     @Override
@@ -689,31 +696,9 @@ public class NMSBinding implements INMSBinding {
         return overworld || nether || end;
     }
 
-    private WorldLoader.DataLoadContext supplier(WorldLoader.DataLoadContext old) {
-        return dataLoadContext.aquire(() -> new WorldLoader.DataLoadContext(
-                old.resources(),
-                old.dataConfiguration(),
-                old.datapackWorldgen(),
-                createRegistryAccess(old.datapackDimensions(), false, true, true, true)
-        ));
-    }
-
-    @SneakyThrows
-    private AutoClosing inject(Function<WorldLoader.DataLoadContext, WorldLoader.DataLoadContext> transformer) {
-        if (!dataContextLock.tryLock()) throw new IllegalStateException("Failed to inject data context!");
-
-        var server = ((CraftServer) Bukkit.getServer());
-        var field = getField(MinecraftServer.class, WorldLoader.DataLoadContext.class);
-        var nmsServer = server.getServer();
-        var old = nmsServer.worldLoader;
-
-        field.setAccessible(true);
-        field.set(nmsServer, transformer.apply(old));
-
-        return new AutoClosing(() -> {
-            field.set(nmsServer, old);
-            dataContextLock.unlock();
-        });
+    @Override
+    public void removeCustomDimensions(World world) {
+        ((CraftWorld) world).getHandle().K.customDimensions = null;
     }
 
     private RegistryAccess.Frozen createRegistryAccess(RegistryAccess.Frozen datapack, boolean copy, boolean overworld, boolean nether, boolean end) {
@@ -737,7 +722,7 @@ public class NMSBinding implements INMSBinding {
 
         if (copy) copy(fake, access.registryOrThrow(Registries.LEVEL_STEM));
 
-        return new RegistryAccess.Frozen.ImmutableRegistryAccess(List.of(fake.freeze())).freeze();
+        return new RegistryAccess.Frozen.ImmutableRegistryAccess(List.of(fake)).freeze();
     }
 
     private void register(MappedRegistry<LevelStem> target, Registry<DimensionType> dimensions, FlatLevelSource source, ResourceKey<LevelStem> key) {

nms/v1_20_R4/src/main/java/com/volmit/iris/core/nms/v1_20_R4/IrisChunkGenerator.java

@@ -23,6 +23,7 @@ import net.minecraft.resources.ResourceKey;
 import net.minecraft.resources.ResourceLocation;
 import net.minecraft.server.level.ServerLevel;
 import net.minecraft.server.level.WorldGenRegion;
+import net.minecraft.tags.StructureTags;
 import net.minecraft.tags.TagKey;
 import net.minecraft.util.random.WeightedRandomList;
 import net.minecraft.world.entity.MobCategory;
@@ -120,6 +121,11 @@ public class IrisChunkGenerator extends CustomChunkGenerator {
 
     @Override
     public @Nullable Pair<BlockPos, Holder<Structure>> findNearestMapStructure(ServerLevel level, HolderSet<Structure> holders, BlockPos pos, int radius, boolean findUnexplored) {
+        if (holders.size() == 0) return null;
+        if (holders.unwrapKey().orElse(null) == StructureTags.EYE_OF_ENDER_LOCATED) {
+            var next = engine.getNearestStronghold(new Position2(pos.getX(), pos.getZ()));
+            return next == null ? null : new Pair<>(new BlockPos(next.getX(), 0, next.getZ()), holders.get(0));
+        }
         if (engine.getDimension().isDisableExplorerMaps())
             return null;
 

nms/v1_20_R4/src/main/java/com/volmit/iris/core/nms/v1_20_R4/NMSBinding.java

@@ -672,37 +672,44 @@ public class NMSBinding implements INMSBinding {
     }
 
     @Override
+    @SneakyThrows
     public AutoClosing injectLevelStems() {
-        return inject(this::supplier);
+        if (!dataContextLock.tryLock()) throw new IllegalStateException("Failed to inject data context!");
+
+        var server = ((CraftServer) Bukkit.getServer());
+        var field = getField(MinecraftServer.class, WorldLoader.DataLoadContext.class);
+        var nmsServer = server.getServer();
+        var old = nmsServer.worldLoader;
+
+        field.setAccessible(true);
+        field.set(nmsServer, dataLoadContext.aquire(() -> new WorldLoader.DataLoadContext(
+                old.resources(),
+                old.dataConfiguration(),
+                old.datapackWorldgen(),
+                createRegistryAccess(old.datapackDimensions(), false, true, true, true)
+        )));
+
+        return new AutoClosing(() -> {
+            field.set(nmsServer, old);
+            dataContextLock.unlock();
+        });
     }
 
     @Override
     @SneakyThrows
-    public com.volmit.iris.core.nms.container.Pair<Integer, AutoClosing> injectUncached(boolean overworld, boolean nether, boolean end) {
+    public AutoClosing injectUncached(boolean overworld, boolean nether, boolean end) {
         var reg = registry();
         var field = getField(RegistryAccess.ImmutableRegistryAccess.class, Map.class);
         field.setAccessible(true);
 
-        AutoClosing closing = inject(old -> new WorldLoader.DataLoadContext(
-                        old.resources(),
-                        old.dataConfiguration(),
-                        old.datapackWorldgen(),
-                        createRegistryAccess(old.datapackDimensions(), true, overworld, nether, end)
-                )
-        );
-
-        var injected = ((CraftServer) Bukkit.getServer()).getServer().worldLoader.datapackDimensions().registryOrThrow(Registries.LEVEL_STEM);
+        var access = createRegistryAccess(((CraftServer) Bukkit.getServer()).getServer().worldLoader.datapackDimensions(), true, overworld, nether, end);
+        var injected = access.registryOrThrow(Registries.LEVEL_STEM);
         var old = (Map<ResourceKey<? extends Registry<?>>, Registry<?>>) field.get(reg);
         var fake = new HashMap<>(old);
         fake.put(Registries.LEVEL_STEM, injected);
         field.set(reg, fake);
 
-        return new com.volmit.iris.core.nms.container.Pair<>(
-                injected.size(),
-                new AutoClosing(() -> {
-                    closing.close();
-                    field.set(reg, old);
-                }));
+        return new AutoClosing(() -> field.set(reg, old));
     }
 
     @Override
@@ -714,31 +721,9 @@ public class NMSBinding implements INMSBinding {
         return overworld || nether || end;
     }
 
-    private WorldLoader.DataLoadContext supplier(WorldLoader.DataLoadContext old) {
-        return dataLoadContext.aquire(() -> new WorldLoader.DataLoadContext(
-                old.resources(),
-                old.dataConfiguration(),
-                old.datapackWorldgen(),
-                createRegistryAccess(old.datapackDimensions(), false, true, true, true)
-        ));
-    }
-
-    @SneakyThrows
-    private AutoClosing inject(Function<WorldLoader.DataLoadContext, WorldLoader.DataLoadContext> transformer) {
-        if (!dataContextLock.tryLock()) throw new IllegalStateException("Failed to inject data context!");
-
-        var server = ((CraftServer) Bukkit.getServer());
-        var field = getField(MinecraftServer.class, WorldLoader.DataLoadContext.class);
-        var nmsServer = server.getServer();
-        var old = nmsServer.worldLoader;
-
-        field.setAccessible(true);
-        field.set(nmsServer, transformer.apply(old));
-
-        return new AutoClosing(() -> {
-            field.set(nmsServer, old);
-            dataContextLock.unlock();
-        });
+    @Override
+    public void removeCustomDimensions(World world) {
+        ((CraftWorld) world).getHandle().K.customDimensions = null;
     }
 
     private RegistryAccess.Frozen createRegistryAccess(RegistryAccess.Frozen datapack, boolean copy, boolean overworld, boolean nether, boolean end) {
@@ -762,7 +747,7 @@ public class NMSBinding implements INMSBinding {
 
         if (copy) copy(fake, access.registryOrThrow(Registries.LEVEL_STEM));
 
-        return new RegistryAccess.Frozen.ImmutableRegistryAccess(List.of(fake.freeze())).freeze();
+        return new RegistryAccess.Frozen.ImmutableRegistryAccess(List.of(fake)).freeze();
     }
 
     private void register(MappedRegistry<LevelStem> target, Registry<DimensionType> dimensions, FlatLevelSource source, ResourceKey<LevelStem> key) {

nms/v1_21_R1/src/main/java/com/volmit/iris/core/nms/v1_21_R1/IrisChunkGenerator.java

@@ -23,6 +23,7 @@ import net.minecraft.resources.ResourceKey;
 import net.minecraft.resources.ResourceLocation;
 import net.minecraft.server.level.ServerLevel;
 import net.minecraft.server.level.WorldGenRegion;
+import net.minecraft.tags.StructureTags;
 import net.minecraft.tags.TagKey;
 import net.minecraft.util.random.WeightedRandomList;
 import net.minecraft.world.entity.MobCategory;
@@ -121,6 +122,11 @@ public class IrisChunkGenerator extends CustomChunkGenerator {
 
     @Override
     public @Nullable Pair<BlockPos, Holder<Structure>> findNearestMapStructure(ServerLevel level, HolderSet<Structure> holders, BlockPos pos, int radius, boolean findUnexplored) {
+        if (holders.size() == 0) return null;
+        if (holders.unwrapKey().orElse(null) == StructureTags.EYE_OF_ENDER_LOCATED) {
+            var next = engine.getNearestStronghold(new Position2(pos.getX(), pos.getZ()));
+            return next == null ? null : new Pair<>(new BlockPos(next.getX(), 0, next.getZ()), holders.get(0));
+        }
         if (engine.getDimension().isDisableExplorerMaps())
             return null;
 

nms/v1_21_R1/src/main/java/com/volmit/iris/core/nms/v1_21_R1/NMSBinding.java

@@ -676,37 +676,44 @@ public class NMSBinding implements INMSBinding {
     }
 
     @Override
+    @SneakyThrows
     public AutoClosing injectLevelStems() {
-        return inject(this::supplier);
+        if (!dataContextLock.tryLock()) throw new IllegalStateException("Failed to inject data context!");
+
+        var server = ((CraftServer) Bukkit.getServer());
+        var field = getField(MinecraftServer.class, WorldLoader.DataLoadContext.class);
+        var nmsServer = server.getServer();
+        var old = nmsServer.worldLoader;
+
+        field.setAccessible(true);
+        field.set(nmsServer, dataLoadContext.aquire(() -> new WorldLoader.DataLoadContext(
+                old.resources(),
+                old.dataConfiguration(),
+                old.datapackWorldgen(),
+                createRegistryAccess(old.datapackDimensions(), false, true, true, true)
+        )));
+
+        return new AutoClosing(() -> {
+            field.set(nmsServer, old);
+            dataContextLock.unlock();
+        });
     }
 
     @Override
     @SneakyThrows
-    public com.volmit.iris.core.nms.container.Pair<Integer, AutoClosing> injectUncached(boolean overworld, boolean nether, boolean end) {
+    public AutoClosing injectUncached(boolean overworld, boolean nether, boolean end) {
         var reg = registry();
         var field = getField(RegistryAccess.ImmutableRegistryAccess.class, Map.class);
         field.setAccessible(true);
 
-        AutoClosing closing = inject(old -> new WorldLoader.DataLoadContext(
-                        old.resources(),
-                        old.dataConfiguration(),
-                        old.datapackWorldgen(),
-                        createRegistryAccess(old.datapackDimensions(), true, overworld, nether, end)
-                )
-        );
-
-        var injected = ((CraftServer) Bukkit.getServer()).getServer().worldLoader.datapackDimensions().registryOrThrow(Registries.LEVEL_STEM);
+        var access = createRegistryAccess(((CraftServer) Bukkit.getServer()).getServer().worldLoader.datapackDimensions(), true, overworld, nether, end);
+        var injected = access.registryOrThrow(Registries.LEVEL_STEM);
         var old = (Map<ResourceKey<? extends Registry<?>>, Registry<?>>) field.get(reg);
         var fake = new HashMap<>(old);
         fake.put(Registries.LEVEL_STEM, injected);
         field.set(reg, fake);
 
-        return new com.volmit.iris.core.nms.container.Pair<>(
-                injected.size(),
-                new AutoClosing(() -> {
-                    closing.close();
-                    field.set(reg, old);
-                }));
+        return new AutoClosing(() -> field.set(reg, old));
     }
 
     @Override
@@ -718,31 +725,9 @@ public class NMSBinding implements INMSBinding {
         return overworld || nether || end;
     }
 
-    private WorldLoader.DataLoadContext supplier(WorldLoader.DataLoadContext old) {
-        return dataLoadContext.aquire(() -> new WorldLoader.DataLoadContext(
-                old.resources(),
-                old.dataConfiguration(),
-                old.datapackWorldgen(),
-                createRegistryAccess(old.datapackDimensions(), false, true, true, true)
-        ));
-    }
-
-    @SneakyThrows
-    private AutoClosing inject(Function<WorldLoader.DataLoadContext, WorldLoader.DataLoadContext> transformer) {
-        if (!dataContextLock.tryLock()) throw new IllegalStateException("Failed to inject data context!");
-
-        var server = ((CraftServer) Bukkit.getServer());
-        var field = getField(MinecraftServer.class, WorldLoader.DataLoadContext.class);
-        var nmsServer = server.getServer();
-        var old = nmsServer.worldLoader;
-
-        field.setAccessible(true);
-        field.set(nmsServer, transformer.apply(old));
-
-        return new AutoClosing(() -> {
-            field.set(nmsServer, old);
-            dataContextLock.unlock();
-        });
+    @Override
+    public void removeCustomDimensions(World world) {
+        ((CraftWorld) world).getHandle().K.customDimensions = null;
     }
 
     private RegistryAccess.Frozen createRegistryAccess(RegistryAccess.Frozen datapack, boolean copy, boolean overworld, boolean nether, boolean end) {
@@ -766,7 +751,7 @@ public class NMSBinding implements INMSBinding {
 
         if (copy) copy(fake, access.registryOrThrow(Registries.LEVEL_STEM));
 
-        return new RegistryAccess.Frozen.ImmutableRegistryAccess(List.of(fake.freeze())).freeze();
+        return new RegistryAccess.Frozen.ImmutableRegistryAccess(List.of(fake)).freeze();
     }
 
     private void register(MappedRegistry<LevelStem> target, Registry<DimensionType> dimensions, FlatLevelSource source, ResourceKey<LevelStem> key) {

nms/v1_21_R2/src/main/java/com/volmit/iris/core/nms/v1_21_R2/IrisChunkGenerator.java

@@ -23,6 +23,7 @@ import net.minecraft.resources.ResourceKey;
 import net.minecraft.resources.ResourceLocation;
 import net.minecraft.server.level.ServerLevel;
 import net.minecraft.server.level.WorldGenRegion;
+import net.minecraft.tags.StructureTags;
 import net.minecraft.tags.TagKey;
 import net.minecraft.util.random.WeightedRandomList;
 import net.minecraft.world.entity.MobCategory;
@@ -120,6 +121,11 @@ public class IrisChunkGenerator extends CustomChunkGenerator {
 
     @Override
     public @Nullable Pair<BlockPos, Holder<Structure>> findNearestMapStructure(ServerLevel level, HolderSet<Structure> holders, BlockPos pos, int radius, boolean findUnexplored) {
+        if (holders.size() == 0) return null;
+        if (holders.unwrapKey().orElse(null) == StructureTags.EYE_OF_ENDER_LOCATED) {
+            var next = engine.getNearestStronghold(new Position2(pos.getX(), pos.getZ()));
+            return next == null ? null : new Pair<>(new BlockPos(next.getX(), 0, next.getZ()), holders.get(0));
+        }
         if (engine.getDimension().isDisableExplorerMaps())
             return null;
 

nms/v1_21_R2/src/main/java/com/volmit/iris/core/nms/v1_21_R2/NMSBinding.java

@@ -666,37 +666,44 @@ public class NMSBinding implements INMSBinding {
     }
 
     @Override
+    @SneakyThrows
     public AutoClosing injectLevelStems() {
-        return inject(this::supplier);
+        if (!dataContextLock.tryLock()) throw new IllegalStateException("Failed to inject data context!");
+
+        var server = ((CraftServer) Bukkit.getServer());
+        var field = getField(MinecraftServer.class, WorldLoader.DataLoadContext.class);
+        var nmsServer = server.getServer();
+        var old = nmsServer.worldLoader;
+
+        field.setAccessible(true);
+        field.set(nmsServer, dataLoadContext.aquire(() -> new WorldLoader.DataLoadContext(
+                old.resources(),
+                old.dataConfiguration(),
+                old.datapackWorldgen(),
+                createRegistryAccess(old.datapackDimensions(), false, true, true, true)
+        )));
+
+        return new AutoClosing(() -> {
+            field.set(nmsServer, old);
+            dataContextLock.unlock();
+        });
     }
 
     @Override
     @SneakyThrows
-    public Pair<Integer, AutoClosing> injectUncached(boolean overworld, boolean nether, boolean end) {
+    public AutoClosing injectUncached(boolean overworld, boolean nether, boolean end) {
         var reg = registry();
         var field = getField(RegistryAccess.ImmutableRegistryAccess.class, Map.class);
         field.setAccessible(true);
 
-        AutoClosing closing = inject(old -> new WorldLoader.DataLoadContext(
-                        old.resources(),
-                        old.dataConfiguration(),
-                        old.datapackWorldgen(),
-                        createRegistryAccess(old.datapackDimensions(), true, overworld, nether, end)
-                )
-        );
-
-        var injected = ((CraftServer) Bukkit.getServer()).getServer().worldLoader.datapackDimensions().lookupOrThrow(Registries.LEVEL_STEM);
+        var access = createRegistryAccess(((CraftServer) Bukkit.getServer()).getServer().worldLoader.datapackDimensions(), true, overworld, nether, end);
+        var injected = access.lookupOrThrow(Registries.LEVEL_STEM);
         var old = (Map<ResourceKey<? extends Registry<?>>, Registry<?>>) field.get(reg);
         var fake = new HashMap<>(old);
         fake.put(Registries.LEVEL_STEM, injected);
         field.set(reg, fake);
 
-        return new Pair<>(
-                injected.size(),
-                new AutoClosing(() -> {
-                    closing.close();
-                    field.set(reg, old);
-                }));
+        return new AutoClosing(() -> field.set(reg, old));
     }
 
     @Override
@@ -708,31 +715,9 @@ public class NMSBinding implements INMSBinding {
         return overworld || nether || end;
     }
 
-    private WorldLoader.DataLoadContext supplier(WorldLoader.DataLoadContext old) {
-        return dataLoadContext.aquire(() -> new WorldLoader.DataLoadContext(
-                old.resources(),
-                old.dataConfiguration(),
-                old.datapackWorldgen(),
-                createRegistryAccess(old.datapackDimensions(), false, true, true, true)
-        ));
-    }
-
-    @SneakyThrows
-    private AutoClosing inject(Function<WorldLoader.DataLoadContext, WorldLoader.DataLoadContext> transformer) {
-        if (!dataContextLock.tryLock()) throw new IllegalStateException("Failed to inject data context!");
-
-        var server = ((CraftServer) Bukkit.getServer());
-        var field = getField(MinecraftServer.class, WorldLoader.DataLoadContext.class);
-        var nmsServer = server.getServer();
-        var old = nmsServer.worldLoader;
-
-        field.setAccessible(true);
-        field.set(nmsServer, transformer.apply(old));
-
-        return new AutoClosing(() -> {
-            field.set(nmsServer, old);
-            dataContextLock.unlock();
-        });
+    @Override
+    public void removeCustomDimensions(World world) {
+        ((CraftWorld) world).getHandle().L.customDimensions = null;
     }
 
     private RegistryAccess.Frozen createRegistryAccess(RegistryAccess.Frozen datapack, boolean copy, boolean overworld, boolean nether, boolean end) {
@@ -756,7 +741,7 @@ public class NMSBinding implements INMSBinding {
 
         if (copy) copy(fake, access.lookupOrThrow(Registries.LEVEL_STEM));
 
-        return new RegistryAccess.Frozen.ImmutableRegistryAccess(List.of(fake.freeze())).freeze();
+        return new RegistryAccess.Frozen.ImmutableRegistryAccess(List.of(fake)).freeze();
     }
 
     private void register(MappedRegistry<LevelStem> target, Registry<DimensionType> dimensions, FlatLevelSource source, ResourceKey<LevelStem> key) {

nms/v1_21_R3/src/main/java/com/volmit/iris/core/nms/v1_21_R3/IrisChunkGenerator.java

@@ -20,9 +20,11 @@ import net.minecraft.resources.ResourceKey;
 import net.minecraft.resources.ResourceLocation;
 import net.minecraft.server.level.ServerLevel;
 import net.minecraft.server.level.WorldGenRegion;
+import net.minecraft.tags.StructureTags;
 import net.minecraft.tags.TagKey;
 import net.minecraft.util.random.WeightedRandomList;
 import net.minecraft.world.entity.MobCategory;
+import net.minecraft.world.item.EnderEyeItem;
 import net.minecraft.world.level.*;
 import net.minecraft.world.level.biome.*;
 import net.minecraft.world.level.chunk.ChunkAccess;
@@ -31,6 +33,7 @@ import net.minecraft.world.level.chunk.ChunkGeneratorStructureState;
 import net.minecraft.world.level.levelgen.Heightmap;
 import net.minecraft.world.level.levelgen.RandomState;
 import net.minecraft.world.level.levelgen.blending.Blender;
+import net.minecraft.world.level.levelgen.structure.BuiltinStructures;
 import net.minecraft.world.level.levelgen.structure.Structure;
 import net.minecraft.world.level.levelgen.structure.StructureSet;
 import net.minecraft.world.level.levelgen.structure.templatesystem.StructureTemplateManager;
@@ -114,6 +117,11 @@ public class IrisChunkGenerator extends CustomChunkGenerator {
 
     @Override
     public @Nullable Pair<BlockPos, Holder<Structure>> findNearestMapStructure(ServerLevel level, HolderSet<Structure> holders, BlockPos pos, int radius, boolean findUnexplored) {
+        if (holders.size() == 0) return null;
+        if (holders.unwrapKey().orElse(null) == StructureTags.EYE_OF_ENDER_LOCATED) {
+            var next = engine.getNearestStronghold(new Position2(pos.getX(), pos.getZ()));
+            return next == null ? null : new Pair<>(new BlockPos(next.getX(), 0, next.getZ()), holders.get(0));
+        }
         if (engine.getDimension().isDisableExplorerMaps())
             return null;
 

nms/v1_21_R3/src/main/java/com/volmit/iris/core/nms/v1_21_R3/NMSBinding.java

@@ -665,37 +665,44 @@ public class NMSBinding implements INMSBinding {
     }
 
     @Override
+    @SneakyThrows
     public AutoClosing injectLevelStems() {
-        return inject(this::supplier);
+        if (!dataContextLock.tryLock()) throw new IllegalStateException("Failed to inject data context!");
+
+        var server = ((CraftServer) Bukkit.getServer());
+        var field = getField(MinecraftServer.class, WorldLoader.DataLoadContext.class);
+        var nmsServer = server.getServer();
+        var old = nmsServer.worldLoader;
+
+        field.setAccessible(true);
+        field.set(nmsServer, dataLoadContext.aquire(() -> new WorldLoader.DataLoadContext(
+                old.resources(),
+                old.dataConfiguration(),
+                old.datapackWorldgen(),
+                createRegistryAccess(old.datapackDimensions(), false, true, true, true)
+        )));
+
+        return new AutoClosing(() -> {
+            field.set(nmsServer, old);
+            dataContextLock.unlock();
+        });
     }
 
     @Override
     @SneakyThrows
-    public Pair<Integer, AutoClosing> injectUncached(boolean overworld, boolean nether, boolean end) {
+    public AutoClosing injectUncached(boolean overworld, boolean nether, boolean end) {
         var reg = registry();
         var field = getField(RegistryAccess.ImmutableRegistryAccess.class, Map.class);
         field.setAccessible(true);
 
-        AutoClosing closing = inject(old -> new WorldLoader.DataLoadContext(
-                    old.resources(),
-                    old.dataConfiguration(),
-                    old.datapackWorldgen(),
-                    createRegistryAccess(old.datapackDimensions(), true, overworld, nether, end)
-                )
-        );
-
-        var injected = ((CraftServer) Bukkit.getServer()).getServer().worldLoader.datapackDimensions().lookupOrThrow(Registries.LEVEL_STEM);
+        var access = createRegistryAccess(((CraftServer) Bukkit.getServer()).getServer().worldLoader.datapackDimensions(), true, overworld, nether, end);
+        var injected = access.lookupOrThrow(Registries.LEVEL_STEM);
         var old = (Map<ResourceKey<? extends Registry<?>>, Registry<?>>) field.get(reg);
         var fake = new HashMap<>(old);
         fake.put(Registries.LEVEL_STEM, injected);
         field.set(reg, fake);
 
-        return new Pair<>(
-                injected.size(),
-                new AutoClosing(() -> {
-                    closing.close();
-                    field.set(reg, old);
-                }));
+        return new AutoClosing(() -> field.set(reg, old));
     }
 
     @Override
@@ -707,31 +714,9 @@ public class NMSBinding implements INMSBinding {
         return overworld || nether || end;
     }
 
-    private WorldLoader.DataLoadContext supplier(WorldLoader.DataLoadContext old) {
-        return dataLoadContext.aquire(() -> new WorldLoader.DataLoadContext(
-                old.resources(),
-                old.dataConfiguration(),
-                old.datapackWorldgen(),
-                createRegistryAccess(old.datapackDimensions(), false, true, true, true)
-        ));
-    }
-
-    @SneakyThrows
-    private AutoClosing inject(Function<WorldLoader.DataLoadContext, WorldLoader.DataLoadContext> transformer) {
-        if (!dataContextLock.tryLock()) throw new IllegalStateException("Failed to inject data context!");
-
-        var server = ((CraftServer) Bukkit.getServer());
-        var field = getField(MinecraftServer.class, WorldLoader.DataLoadContext.class);
-        var nmsServer = server.getServer();
-        var old = nmsServer.worldLoader;
-
-        field.setAccessible(true);
-        field.set(nmsServer, transformer.apply(old));
-
-        return new AutoClosing(() -> {
-            field.set(nmsServer, old);
-            dataContextLock.unlock();
-        });
+    @Override
+    public void removeCustomDimensions(World world) {
+        ((CraftWorld) world).getHandle().L.customDimensions = null;
     }
 
     private RegistryAccess.Frozen createRegistryAccess(RegistryAccess.Frozen datapack, boolean copy, boolean overworld, boolean nether, boolean end) {
@@ -755,7 +740,7 @@ public class NMSBinding implements INMSBinding {
 
         if (copy) copy(fake, access.lookupOrThrow(Registries.LEVEL_STEM));
 
-        return new RegistryAccess.Frozen.ImmutableRegistryAccess(List.of(fake.freeze())).freeze();
+        return new RegistryAccess.Frozen.ImmutableRegistryAccess(List.of(fake)).freeze();
     }
 
     private void register(MappedRegistry<LevelStem> target, Registry<DimensionType> dimensions, FlatLevelSource source, ResourceKey<LevelStem> key) {

nms/v1_21_R4/src/main/java/com/volmit/iris/core/nms/v1_21_R4/CustomBiomeSource.java

@@ -0,0 +1,169 @@
+package com.volmit.iris.core.nms.v1_21_R4;
+
+import com.mojang.serialization.MapCodec;
+import com.volmit.iris.Iris;
+import com.volmit.iris.engine.data.cache.AtomicCache;
+import com.volmit.iris.engine.framework.Engine;
+import com.volmit.iris.engine.object.IrisBiome;
+import com.volmit.iris.engine.object.IrisBiomeCustom;
+import com.volmit.iris.util.collection.KMap;
+import com.volmit.iris.util.math.RNG;
+import net.minecraft.core.Holder;
+import net.minecraft.core.Registry;
+import net.minecraft.core.RegistryAccess;
+import net.minecraft.core.registries.Registries;
+import net.minecraft.resources.ResourceKey;
+import net.minecraft.resources.ResourceLocation;
+import net.minecraft.world.level.biome.Biome;
+import net.minecraft.world.level.biome.BiomeSource;
+import net.minecraft.world.level.biome.Climate;
+import org.bukkit.Bukkit;
+import org.bukkit.World;
+import org.bukkit.craftbukkit.v1_21_R4.CraftServer;
+import org.bukkit.craftbukkit.v1_21_R4.CraftWorld;
+
+import java.lang.reflect.Field;
+import java.lang.reflect.Method;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Optional;
+import java.util.stream.Stream;
+
+public class CustomBiomeSource extends BiomeSource {
+
+    private final long seed;
+    private final Engine engine;
+    private final Registry<Biome> biomeCustomRegistry;
+    private final Registry<Biome> biomeRegistry;
+    private final AtomicCache<RegistryAccess> registryAccess = new AtomicCache<>();
+    private final RNG rng;
+    private final KMap<String, Holder<Biome>> customBiomes;
+
+    public CustomBiomeSource(long seed, Engine engine, World world) {
+        this.engine = engine;
+        this.seed = seed;
+        this.biomeCustomRegistry = registry().lookup(Registries.BIOME).orElse(null);
+        this.biomeRegistry = ((RegistryAccess) getFor(RegistryAccess.Frozen.class, ((CraftServer) Bukkit.getServer()).getHandle().getServer())).lookup(Registries.BIOME).orElse(null);
+        this.rng = new RNG(engine.getSeedManager().getBiome());
+        this.customBiomes = fillCustomBiomes(biomeCustomRegistry, engine);
+    }
+
+    private static List<Holder<Biome>> getAllBiomes(Registry<Biome> customRegistry, Registry<Biome> registry, Engine engine) {
+        List<Holder<Biome>> b = new ArrayList<>();
+
+        for (IrisBiome i : engine.getAllBiomes()) {
+            if (i.isCustom()) {
+                for (IrisBiomeCustom j : i.getCustomDerivitives()) {
+                    b.add(customRegistry.get(customRegistry.getResourceKey(customRegistry
+                            .getValue(ResourceLocation.fromNamespaceAndPath(engine.getDimension().getLoadKey(), j.getId()))).get()).get());
+                }
+            } else {
+                b.add(NMSBinding.biomeToBiomeBase(registry, i.getVanillaDerivative()));
+            }
+        }
+
+        return b;
+    }
+
+    private static Object getFor(Class<?> type, Object source) {
+        Object o = fieldFor(type, source);
+
+        if (o != null) {
+            return o;
+        }
+
+        return invokeFor(type, source);
+    }
+
+    private static Object fieldFor(Class<?> returns, Object in) {
+        return fieldForClass(returns, in.getClass(), in);
+    }
+
+    private static Object invokeFor(Class<?> returns, Object in) {
+        for (Method i : in.getClass().getMethods()) {
+            if (i.getReturnType().equals(returns)) {
+                i.setAccessible(true);
+                try {
+                    Iris.debug("[NMS] Found " + returns.getSimpleName() + " in " + in.getClass().getSimpleName() + "." + i.getName() + "()");
+                    return i.invoke(in);
+                } catch (Throwable e) {
+                    e.printStackTrace();
+                }
+            }
+        }
+
+        return null;
+    }
+
+    @SuppressWarnings("unchecked")
+    private static <T> T fieldForClass(Class<T> returnType, Class<?> sourceType, Object in) {
+        for (Field i : sourceType.getDeclaredFields()) {
+            if (i.getType().equals(returnType)) {
+                i.setAccessible(true);
+                try {
+                    Iris.debug("[NMS] Found " + returnType.getSimpleName() + " in " + sourceType.getSimpleName() + "." + i.getName());
+                    return (T) i.get(in);
+                } catch (IllegalAccessException e) {
+                    e.printStackTrace();
+                }
+            }
+        }
+        return null;
+    }
+
+    @Override
+    protected Stream<Holder<Biome>> collectPossibleBiomes() {
+        return getAllBiomes(
+                ((RegistryAccess) getFor(RegistryAccess.Frozen.class, ((CraftServer) Bukkit.getServer()).getHandle().getServer()))
+                        .lookup(Registries.BIOME).orElse(null),
+                ((CraftWorld) engine.getWorld().realWorld()).getHandle().registryAccess().lookup(Registries.BIOME).orElse(null),
+                engine).stream();
+    }
+    private KMap<String, Holder<Biome>> fillCustomBiomes(Registry<Biome> customRegistry, Engine engine) {
+        KMap<String, Holder<Biome>> m = new KMap<>();
+
+        for (IrisBiome i : engine.getAllBiomes()) {
+            if (i.isCustom()) {
+                for (IrisBiomeCustom j : i.getCustomDerivitives()) {
+                    ResourceLocation resourceLocation = ResourceLocation.fromNamespaceAndPath(engine.getDimension().getLoadKey(), j.getId());
+                    Biome biome = customRegistry.getValue(resourceLocation);
+                    Optional<ResourceKey<Biome>> optionalBiomeKey = customRegistry.getResourceKey(biome);
+                    if (optionalBiomeKey.isEmpty()) {
+                        Iris.error("Cannot find biome for IrisBiomeCustom " + j.getId() + " from engine " + engine.getName());
+                        continue;
+                    }
+                    ResourceKey<Biome> biomeKey = optionalBiomeKey.get();
+                    Optional<Holder.Reference<Biome>> optionalReferenceHolder = customRegistry.get(biomeKey);
+                    if (optionalReferenceHolder.isEmpty()) {
+                        Iris.error("Cannot find reference to biome " + biomeKey + " for engine " + engine.getName());
+                        continue;
+                    }
+                    m.put(j.getId(), optionalReferenceHolder.get());
+                }
+            }
+        }
+
+        return m;
+    }
+
+    private RegistryAccess registry() {
+        return registryAccess.aquire(() -> (RegistryAccess) getFor(RegistryAccess.Frozen.class, ((CraftServer) Bukkit.getServer()).getHandle().getServer()));
+    }
+
+    @Override
+    protected MapCodec<? extends BiomeSource> codec() {
+        throw new UnsupportedOperationException("Not supported");
+    }
+
+    @Override
+    public Holder<Biome> getNoiseBiome(int x, int y, int z, Climate.Sampler sampler) {
+        int m = (y - engine.getMinHeight()) << 2;
+        IrisBiome ib = engine.getComplex().getTrueBiomeStream().get(x << 2, z << 2);
+        if (ib.isCustom()) {
+            return customBiomes.get(ib.getCustomBiome(rng, x << 2, m, z << 2).getId());
+        } else {
+            org.bukkit.block.Biome v = ib.getSkyBiome(rng, x << 2, m, z << 2);
+            return NMSBinding.biomeToBiomeBase(biomeRegistry, v);
+        }
+    }
+}

nms/v1_21_R4/src/main/java/com/volmit/iris/core/nms/v1_21_R4/IrisChunkGenerator.java

@@ -0,0 +1,311 @@
+package com.volmit.iris.core.nms.v1_21_R4;
+
+import com.mojang.datafixers.util.Pair;
+import com.mojang.serialization.MapCodec;
+import com.volmit.iris.Iris;
+import com.volmit.iris.engine.framework.Engine;
+import com.volmit.iris.engine.framework.ResultLocator;
+import com.volmit.iris.engine.framework.WrongEngineBroException;
+import com.volmit.iris.engine.object.IrisJigsawStructure;
+import com.volmit.iris.engine.object.IrisJigsawStructurePlacement;
+import com.volmit.iris.util.collection.KList;
+import com.volmit.iris.util.collection.KMap;
+import com.volmit.iris.util.collection.KSet;
+import com.volmit.iris.util.mantle.MantleFlag;
+import com.volmit.iris.util.math.Position2;
+import com.volmit.iris.util.reflect.WrappedField;
+import net.minecraft.core.*;
+import net.minecraft.core.registries.Registries;
+import net.minecraft.resources.ResourceKey;
+import net.minecraft.resources.ResourceLocation;
+import net.minecraft.server.level.ServerLevel;
+import net.minecraft.server.level.WorldGenRegion;
+import net.minecraft.tags.StructureTags;
+import net.minecraft.tags.TagKey;
+import net.minecraft.util.random.WeightedList;
+import net.minecraft.world.entity.MobCategory;
+import net.minecraft.world.level.*;
+import net.minecraft.world.level.biome.*;
+import net.minecraft.world.level.chunk.ChunkAccess;
+import net.minecraft.world.level.chunk.ChunkGenerator;
+import net.minecraft.world.level.chunk.ChunkGeneratorStructureState;
+import net.minecraft.world.level.levelgen.Heightmap;
+import net.minecraft.world.level.levelgen.RandomState;
+import net.minecraft.world.level.levelgen.blending.Blender;
+import net.minecraft.world.level.levelgen.structure.Structure;
+import net.minecraft.world.level.levelgen.structure.StructureSet;
+import net.minecraft.world.level.levelgen.structure.templatesystem.StructureTemplateManager;
+import org.bukkit.World;
+import org.bukkit.craftbukkit.v1_21_R4.CraftWorld;
+import org.bukkit.craftbukkit.v1_21_R4.generator.CustomChunkGenerator;
+import org.spigotmc.SpigotWorldConfig;
+
+import javax.annotation.Nullable;
+import java.lang.reflect.Field;
+import java.util.List;
+import java.util.Objects;
+import java.util.Optional;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.ExecutionException;
+
+public class IrisChunkGenerator extends CustomChunkGenerator {
+    private static final WrappedField<ChunkGenerator, BiomeSource> BIOME_SOURCE;
+    private final ChunkGenerator delegate;
+    private final Engine engine;
+    private final KMap<ResourceKey<Structure>, KSet<String>> structures = new KMap<>();
+
+    public IrisChunkGenerator(ChunkGenerator delegate, long seed, Engine engine, World world) {
+        super(((CraftWorld) world).getHandle(), edit(delegate, new CustomBiomeSource(seed, engine, world)), null);
+        this.delegate = delegate;
+        this.engine = engine;
+        var dimension = engine.getDimension();
+
+        KSet<IrisJigsawStructure> placements = new KSet<>();
+        addAll(dimension.getJigsawStructures(), placements);
+        for (var region : dimension.getAllRegions(engine)) {
+            addAll(region.getJigsawStructures(), placements);
+            for (var biome : region.getAllBiomes(engine))
+                addAll(biome.getJigsawStructures(), placements);
+        }
+        var stronghold = dimension.getStronghold();
+        if (stronghold != null)
+            placements.add(engine.getData().getJigsawStructureLoader().load(stronghold));
+        placements.removeIf(Objects::isNull);
+
+        var registry = ((CraftWorld) world).getHandle().registryAccess().lookup(Registries.STRUCTURE).orElseThrow();
+        for (var s : placements) {
+            try {
+                String raw = s.getStructureKey();
+                if (raw == null) continue;
+                boolean tag = raw.startsWith("#");
+                if (tag) raw = raw.substring(1);
+
+                var location = ResourceLocation.parse(raw);
+                if (!tag) {
+                    structures.computeIfAbsent(ResourceKey.create(Registries.STRUCTURE, location), k -> new KSet<>()).add(s.getLoadKey());
+                    continue;
+                }
+
+                var key = TagKey.create(Registries.STRUCTURE, location);
+                var set = registry.get(key).orElse(null);
+                if (set == null) {
+                    Iris.error("Could not find structure tag: " + raw);
+                    continue;
+                }
+                for (var holder : set) {
+                    var resourceKey = holder.unwrapKey().orElse(null);
+                    if (resourceKey == null) continue;
+                    structures.computeIfAbsent(resourceKey, k -> new KSet<>()).add(s.getLoadKey());
+                }
+            } catch (Throwable e) {
+                Iris.error("Failed to load structure: " + s.getLoadKey());
+                e.printStackTrace();
+            }
+        }
+    }
+
+    private void addAll(KList<IrisJigsawStructurePlacement> placements, KSet<IrisJigsawStructure> structures) {
+        if (placements == null) return;
+        placements.stream()
+                .map(IrisJigsawStructurePlacement::getStructure)
+                .map(engine.getData().getJigsawStructureLoader()::load)
+                .filter(Objects::nonNull)
+                .forEach(structures::add);
+    }
+
+    @Override
+    public @Nullable Pair<BlockPos, Holder<Structure>> findNearestMapStructure(ServerLevel level, HolderSet<Structure> holders, BlockPos pos, int radius, boolean findUnexplored) {
+        if (holders.size() == 0) return null;
+        if (holders.unwrapKey().orElse(null) == StructureTags.EYE_OF_ENDER_LOCATED) {
+            var next = engine.getNearestStronghold(new Position2(pos.getX(), pos.getZ()));
+            return next == null ? null : new Pair<>(new BlockPos(next.getX(), 0, next.getZ()), holders.get(0));
+        }
+        if (engine.getDimension().isDisableExplorerMaps())
+            return null;
+
+        KMap<String, Holder<Structure>> structures = new KMap<>();
+        for (var holder : holders) {
+            if (holder == null) continue;
+            var key = holder.unwrapKey().orElse(null);
+            var set = this.structures.get(key);
+            if (set == null) continue;
+            for (var structure : set) {
+                structures.put(structure, holder);
+            }
+        }
+        if (structures.isEmpty())
+            return null;
+
+        var locator = ResultLocator.locateStructure(structures.keySet())
+                .then((e, p , s) -> structures.get(s.getLoadKey()));
+        if (findUnexplored)
+            locator = locator.then((e, p, s) -> e.getMantle().getMantle().getChunk(p.getX(), p.getZ()).isFlagged(MantleFlag.DISCOVERED) ? null : s);
+
+        try {
+            var result = locator.find(engine, new Position2(pos.getX() >> 4, pos.getZ() >> 4), radius * 10L, i -> {}, false).get();
+            if (result == null) return null;
+            var blockPos = new BlockPos(result.getBlockX(), 0, result.getBlockZ());
+            return Pair.of(blockPos, result.obj());
+        } catch (WrongEngineBroException | ExecutionException | InterruptedException e) {
+            return null;
+        }
+    }
+
+    @Override
+    protected MapCodec<? extends ChunkGenerator> codec() {
+        return MapCodec.unit(null);
+    }
+
+    @Override
+    public ChunkGenerator getDelegate() {
+        if (delegate instanceof CustomChunkGenerator chunkGenerator)
+            return chunkGenerator.getDelegate();
+        return delegate;
+    }
+
+    @Override
+    public int getMinY() {
+        return delegate.getMinY();
+    }
+
+    @Override
+    public int getSeaLevel() {
+        return delegate.getSeaLevel();
+    }
+
+    @Override
+    public void createStructures(RegistryAccess iregistrycustom, ChunkGeneratorStructureState chunkgeneratorstructurestate, StructureManager structuremanager, ChunkAccess ichunkaccess, StructureTemplateManager structuretemplatemanager, ResourceKey<Level> resourcekey) {
+        delegate.createStructures(iregistrycustom, chunkgeneratorstructurestate, structuremanager, ichunkaccess, structuretemplatemanager, resourcekey);
+    }
+
+    @Override
+    public ChunkGeneratorStructureState createState(HolderLookup<StructureSet> holderlookup, RandomState randomstate, long i, SpigotWorldConfig conf) {
+        return delegate.createState(holderlookup, randomstate, i, conf);
+    }
+
+    @Override
+    public void createReferences(WorldGenLevel generatoraccessseed, StructureManager structuremanager, ChunkAccess ichunkaccess) {
+        delegate.createReferences(generatoraccessseed, structuremanager, ichunkaccess);
+    }
+
+    @Override
+    public CompletableFuture<ChunkAccess> createBiomes(RandomState randomstate, Blender blender, StructureManager structuremanager, ChunkAccess ichunkaccess) {
+        return delegate.createBiomes(randomstate, blender, structuremanager, ichunkaccess);
+    }
+
+    @Override
+    public void buildSurface(WorldGenRegion regionlimitedworldaccess, StructureManager structuremanager, RandomState randomstate, ChunkAccess ichunkaccess) {
+        delegate.buildSurface(regionlimitedworldaccess, structuremanager, randomstate, ichunkaccess);
+    }
+
+    @Override
+    public void applyCarvers(WorldGenRegion regionlimitedworldaccess, long seed, RandomState randomstate, BiomeManager biomemanager, StructureManager structuremanager, ChunkAccess ichunkaccess) {
+        delegate.applyCarvers(regionlimitedworldaccess, seed, randomstate, biomemanager, structuremanager, ichunkaccess);
+    }
+
+    @Override
+    public CompletableFuture<ChunkAccess> fillFromNoise(Blender blender, RandomState randomstate, StructureManager structuremanager, ChunkAccess ichunkaccess) {
+        return delegate.fillFromNoise(blender, randomstate, structuremanager, ichunkaccess);
+    }
+
+    @Override
+    public int getBaseHeight(int i, int j, Heightmap.Types heightmap_type, LevelHeightAccessor levelheightaccessor, RandomState randomstate) {
+        return delegate.getBaseHeight(i, j, heightmap_type, levelheightaccessor, randomstate);
+    }
+
+    @Override
+    public WeightedList<MobSpawnSettings.SpawnerData> getMobsAt(Holder<Biome> holder, StructureManager structuremanager, MobCategory enumcreaturetype, BlockPos blockposition) {
+        return delegate.getMobsAt(holder, structuremanager, enumcreaturetype, blockposition);
+    }
+
+    @Override
+    public void applyBiomeDecoration(WorldGenLevel generatoraccessseed, ChunkAccess ichunkaccess, StructureManager structuremanager) {
+        delegate.applyBiomeDecoration(generatoraccessseed, ichunkaccess, structuremanager);
+    }
+
+    @Override
+    public void addDebugScreenInfo(List<String> list, RandomState randomstate, BlockPos blockposition) {
+        delegate.addDebugScreenInfo(list, randomstate, blockposition);
+    }
+
+    @Override
+    public void applyBiomeDecoration(WorldGenLevel generatoraccessseed, ChunkAccess ichunkaccess, StructureManager structuremanager, boolean vanilla) {
+        delegate.applyBiomeDecoration(generatoraccessseed, ichunkaccess, structuremanager, vanilla);
+    }
+
+    @Override
+    public int getFirstFreeHeight(int i, int j, Heightmap.Types heightmap_type, LevelHeightAccessor levelheightaccessor, RandomState randomstate) {
+        return delegate.getFirstFreeHeight(i, j, heightmap_type, levelheightaccessor, randomstate);
+    }
+
+    @Override
+    public int getFirstOccupiedHeight(int i, int j, Heightmap.Types heightmap_type, LevelHeightAccessor levelheightaccessor, RandomState randomstate) {
+        return delegate.getFirstOccupiedHeight(i, j, heightmap_type, levelheightaccessor, randomstate);
+    }
+
+    @Override
+    public void addVanillaDecorations(WorldGenLevel generatoraccessseed, ChunkAccess ichunkaccess, StructureManager structuremanager) {
+        delegate.addVanillaDecorations(generatoraccessseed, ichunkaccess, structuremanager);
+    }
+
+    @Override
+    public void spawnOriginalMobs(WorldGenRegion regionlimitedworldaccess) {
+        delegate.spawnOriginalMobs(regionlimitedworldaccess);
+    }
+
+    @Override
+    public int getSpawnHeight(LevelHeightAccessor levelheightaccessor) {
+        return delegate.getSpawnHeight(levelheightaccessor);
+    }
+
+    @Override
+    public int getGenDepth() {
+        return delegate.getGenDepth();
+    }
+
+    @Override
+    public NoiseColumn getBaseColumn(int i, int j, LevelHeightAccessor levelheightaccessor, RandomState randomstate) {
+        return delegate.getBaseColumn(i, j, levelheightaccessor, randomstate);
+    }
+
+    @Override
+    public Optional<ResourceKey<MapCodec<? extends ChunkGenerator>>> getTypeNameForDataFixer() {
+        return delegate.getTypeNameForDataFixer();
+    }
+
+    @Override
+    public void validate() {
+        delegate.validate();
+    }
+
+    @Override
+    @SuppressWarnings("deprecation")
+    public BiomeGenerationSettings getBiomeGenerationSettings(Holder<Biome> holder) {
+        return delegate.getBiomeGenerationSettings(holder);
+    }
+
+    static {
+        Field biomeSource = null;
+        for (Field field : ChunkGenerator.class.getDeclaredFields()) {
+            if (!field.getType().equals(BiomeSource.class))
+                continue;
+            biomeSource = field;
+            break;
+        }
+        if (biomeSource == null)
+            throw new RuntimeException("Could not find biomeSource field in ChunkGenerator!");
+        BIOME_SOURCE = new WrappedField<>(ChunkGenerator.class, biomeSource.getName());
+    }
+
+    private static ChunkGenerator edit(ChunkGenerator generator, BiomeSource source) {
+        try {
+            BIOME_SOURCE.set(generator, source);
+            if (generator instanceof CustomChunkGenerator custom)
+                BIOME_SOURCE.set(custom.getDelegate(), source);
+
+            return generator;
+        } catch (IllegalAccessException e) {
+            throw new RuntimeException(e);
+        }
+    }
+}

nms/v1_21_R4/src/main/java/com/volmit/iris/core/nms/v1_21_R4/NMSBinding.java

@@ -0,0 +1,765 @@
+package com.volmit.iris.core.nms.v1_21_R4;
+
+import com.mojang.brigadier.exceptions.CommandSyntaxException;
+import com.mojang.serialization.Lifecycle;
+import com.volmit.iris.Iris;
+import com.volmit.iris.core.nms.INMSBinding;
+import com.volmit.iris.core.nms.container.AutoClosing;
+import com.volmit.iris.core.nms.container.BiomeColor;
+import com.volmit.iris.core.nms.datapack.DataVersion;
+import com.volmit.iris.engine.data.cache.AtomicCache;
+import com.volmit.iris.engine.framework.Engine;
+import com.volmit.iris.util.collection.KList;
+import com.volmit.iris.util.collection.KMap;
+import com.volmit.iris.util.hunk.Hunk;
+import com.volmit.iris.util.json.JSONObject;
+import com.volmit.iris.util.mantle.Mantle;
+import com.volmit.iris.util.math.Vector3d;
+import com.volmit.iris.util.matter.MatterBiomeInject;
+import com.volmit.iris.util.nbt.mca.NBTWorld;
+import com.volmit.iris.util.nbt.mca.palette.*;
+import com.volmit.iris.util.nbt.tag.CompoundTag;
+import com.volmit.iris.util.scheduling.J;
+import it.unimi.dsi.fastutil.objects.Object2IntMap;
+import lombok.SneakyThrows;
+import net.minecraft.core.Registry;
+import net.minecraft.core.*;
+import net.minecraft.core.component.DataComponents;
+import net.minecraft.core.registries.Registries;
+import net.minecraft.nbt.Tag;
+import net.minecraft.nbt.*;
+import net.minecraft.resources.ResourceKey;
+import net.minecraft.resources.ResourceLocation;
+import net.minecraft.server.MinecraftServer;
+import net.minecraft.server.WorldLoader;
+import net.minecraft.server.commands.data.BlockDataAccessor;
+import net.minecraft.server.level.ServerLevel;
+import net.minecraft.tags.TagKey;
+import net.minecraft.world.entity.EntityType;
+import net.minecraft.world.item.component.CustomData;
+import net.minecraft.world.level.LevelReader;
+import net.minecraft.world.level.biome.Biomes;
+import net.minecraft.world.level.block.Block;
+import net.minecraft.world.level.block.Blocks;
+import net.minecraft.world.level.block.EntityBlock;
+import net.minecraft.world.level.block.entity.BlockEntity;
+import net.minecraft.world.level.block.state.BlockState;
+import net.minecraft.world.level.chunk.ChunkAccess;
+import net.minecraft.world.level.chunk.LevelChunk;
+import net.minecraft.world.level.chunk.status.ChunkStatus;
+import net.minecraft.world.level.chunk.status.WorldGenContext;
+import net.minecraft.world.level.dimension.DimensionType;
+import net.minecraft.world.level.dimension.LevelStem;
+import net.minecraft.world.level.levelgen.FlatLevelSource;
+import net.minecraft.world.level.levelgen.flat.FlatLayerInfo;
+import net.minecraft.world.level.levelgen.flat.FlatLevelGeneratorSettings;
+import org.bukkit.*;
+import org.bukkit.block.Biome;
+import org.bukkit.block.data.BlockData;
+import org.bukkit.craftbukkit.v1_21_R4.CraftChunk;
+import org.bukkit.craftbukkit.v1_21_R4.CraftServer;
+import org.bukkit.craftbukkit.v1_21_R4.CraftWorld;
+import org.bukkit.craftbukkit.v1_21_R4.block.CraftBlockState;
+import org.bukkit.craftbukkit.v1_21_R4.block.CraftBlockStates;
+import org.bukkit.craftbukkit.v1_21_R4.block.data.CraftBlockData;
+import org.bukkit.craftbukkit.v1_21_R4.inventory.CraftItemStack;
+import org.bukkit.craftbukkit.v1_21_R4.util.CraftNamespacedKey;
+import org.bukkit.entity.Entity;
+import org.bukkit.event.entity.CreatureSpawnEvent;
+import org.bukkit.generator.ChunkGenerator;
+import org.bukkit.inventory.ItemStack;
+import org.jetbrains.annotations.Contract;
+import org.jetbrains.annotations.NotNull;
+
+import java.awt.Color;
+import java.lang.reflect.Field;
+import java.lang.reflect.Method;
+import java.lang.reflect.Modifier;
+import java.util.List;
+import java.util.*;
+import java.util.concurrent.atomic.AtomicInteger;
+import java.util.concurrent.locks.ReentrantLock;
+
+public class NMSBinding implements INMSBinding {
+    private final KMap<Biome, Object> baseBiomeCache = new KMap<>();
+    private final BlockData AIR = Material.AIR.createBlockData();
+    private final AtomicCache<MCAIdMap<net.minecraft.world.level.biome.Biome>> biomeMapCache = new AtomicCache<>();
+    private final AtomicCache<WorldLoader.DataLoadContext> dataLoadContext = new AtomicCache<>();
+    private final AtomicCache<MCAIdMapper<BlockState>> registryCache = new AtomicCache<>();
+    private final AtomicCache<MCAPalette<BlockState>> globalCache = new AtomicCache<>();
+    private final AtomicCache<RegistryAccess> registryAccess = new AtomicCache<>();
+    private final ReentrantLock dataContextLock = new ReentrantLock(true);
+    private final AtomicCache<Method> byIdRef = new AtomicCache<>();
+    private Field biomeStorageCache = null;
+
+    private static Object getFor(Class<?> type, Object source) {
+        Object o = fieldFor(type, source);
+
+        if (o != null) {
+            return o;
+        }
+
+        return invokeFor(type, source);
+    }
+
+    private static Object invokeFor(Class<?> returns, Object in) {
+        for (Method i : in.getClass().getMethods()) {
+            if (i.getReturnType().equals(returns)) {
+                i.setAccessible(true);
+                try {
+                    Iris.debug("[NMS] Found " + returns.getSimpleName() + " in " + in.getClass().getSimpleName() + "." + i.getName() + "()");
+                    return i.invoke(in);
+                } catch (Throwable e) {
+                    e.printStackTrace();
+                }
+            }
+        }
+
+        return null;
+    }
+
+    private static Object fieldFor(Class<?> returns, Object in) {
+        return fieldForClass(returns, in.getClass(), in);
+    }
+
+    @SuppressWarnings("unchecked")
+    private static <T> T fieldForClass(Class<T> returnType, Class<?> sourceType, Object in) {
+        for (Field i : sourceType.getDeclaredFields()) {
+            if (i.getType().equals(returnType)) {
+                i.setAccessible(true);
+                try {
+                    Iris.debug("[NMS] Found " + returnType.getSimpleName() + " in " + sourceType.getSimpleName() + "." + i.getName());
+                    return (T) i.get(in);
+                } catch (IllegalAccessException e) {
+                    e.printStackTrace();
+                }
+            }
+        }
+        return null;
+    }
+
+    private static Class<?> getClassType(Class<?> type, int ordinal) {
+        return type.getDeclaredClasses()[ordinal];
+    }
+
+    @Override
+    public boolean hasTile(Material material) {
+        return !CraftBlockState.class.equals(CraftBlockStates.getBlockStateType(material));
+    }
+
+    @Override
+    public boolean hasTile(Location l) {
+        return ((CraftWorld) l.getWorld()).getHandle().getBlockEntity(new BlockPos(l.getBlockX(), l.getBlockY(), l.getBlockZ()), false) != null;
+    }
+
+    @Override
+    @SuppressWarnings("unchecked")
+    public KMap<String, Object> serializeTile(Location location) {
+        BlockEntity e = ((CraftWorld) location.getWorld()).getHandle().getBlockEntity(new BlockPos(location.getBlockX(), location.getBlockY(), location.getBlockZ()), false);
+
+        if (e == null) {
+            return null;
+        }
+
+        net.minecraft.nbt.CompoundTag tag = e.saveWithoutMetadata(registry());
+        return (KMap<String, Object>) convertFromTag(tag, 0, 64);
+    }
+
+    @Contract(value = "null, _, _ -> null", pure = true)
+    private Object convertFromTag(net.minecraft.nbt.Tag tag, int depth, int maxDepth) {
+        if (tag == null || depth > maxDepth) return null;
+        return switch (tag) {
+            case CollectionTag collection -> {
+                KList<Object> list = new KList<>();
+
+                for (Object i : collection) {
+                    if (i instanceof net.minecraft.nbt.Tag t)
+                        list.add(convertFromTag(t, depth + 1, maxDepth));
+                    else list.add(i);
+                }
+                yield  list;
+            }
+            case net.minecraft.nbt.CompoundTag compound -> {
+                KMap<String, Object> map = new KMap<>();
+
+                for (String key : compound.keySet()) {
+                    var child = compound.get(key);
+                    if (child == null) continue;
+                    var value = convertFromTag(child, depth + 1, maxDepth);
+                    if (value == null) continue;
+                    map.put(key, value);
+                }
+                yield map;
+            }
+            case NumericTag numeric -> numeric.box();
+            default -> tag.asString().orElse(null);
+        };
+    }
+
+    @Override
+    public void deserializeTile(KMap<String, Object> map, Location pos) {
+        net.minecraft.nbt.CompoundTag tag = (net.minecraft.nbt.CompoundTag) convertToTag(map, 0, 64);
+        var level = ((CraftWorld) pos.getWorld()).getHandle();
+        var blockPos = new BlockPos(pos.getBlockX(), pos.getBlockY(), pos.getBlockZ());
+        J.s(() -> merge(level, blockPos, tag));
+    }
+
+    private void merge(ServerLevel level, BlockPos blockPos, net.minecraft.nbt.CompoundTag tag) {
+        var blockEntity = level.getBlockEntity(blockPos);
+        if (blockEntity == null) {
+            Iris.warn("[NMS] BlockEntity not found at " + blockPos);
+            var state = level.getBlockState(blockPos);
+            if (!state.hasBlockEntity())
+                return;
+
+            blockEntity = ((EntityBlock) state.getBlock())
+                    .newBlockEntity(blockPos, state);
+        }
+        var accessor = new BlockDataAccessor(blockEntity, blockPos);
+        accessor.setData(accessor.getData().merge(tag));
+    }
+
+    private Tag convertToTag(Object object, int depth, int maxDepth) {
+        if (object == null || depth > maxDepth) return EndTag.INSTANCE;
+        return switch (object) {
+            case Map<?, ?> map -> {
+                var tag = new net.minecraft.nbt.CompoundTag();
+                for (var i : map.entrySet()) {
+                    tag.put(i.getKey().toString(), convertToTag(i.getValue(), depth + 1, maxDepth));
+                }
+                yield tag;
+            }
+            case List<?> list -> {
+                var tag = new net.minecraft.nbt.ListTag();
+                for (var i : list) {
+                    tag.add(convertToTag(i, depth + 1, maxDepth));
+                }
+                yield tag;
+            }
+            case Byte number -> ByteTag.valueOf(number);
+            case Short number -> ShortTag.valueOf(number);
+            case Integer number -> IntTag.valueOf(number);
+            case Long number -> LongTag.valueOf(number);
+            case Float number -> FloatTag.valueOf(number);
+            case Double number -> DoubleTag.valueOf(number);
+            case String string -> StringTag.valueOf(string);
+            default -> EndTag.INSTANCE;
+        };
+    }
+
+    @Override
+    public CompoundTag serializeEntity(Entity location) {
+        return null;// TODO:
+    }
+
+    @Override
+    public Entity deserializeEntity(CompoundTag s, Location newPosition) {
+        return null;// TODO:
+    }
+
+    @Override
+    public boolean supportsCustomHeight() {
+        return true;
+    }
+
+    private RegistryAccess registry() {
+        return registryAccess.aquire(() -> (RegistryAccess) getFor(RegistryAccess.Frozen.class, ((CraftServer) Bukkit.getServer()).getHandle().getServer()));
+    }
+
+    private Registry<net.minecraft.world.level.biome.Biome> getCustomBiomeRegistry() {
+        return registry().lookup(Registries.BIOME).orElse(null);
+    }
+
+    private Registry<Block> getBlockRegistry() {
+        return registry().lookup(Registries.BLOCK).orElse(null);
+    }
+
+    @Override
+    public Object getBiomeBaseFromId(int id) {
+        return getCustomBiomeRegistry().get(id);
+    }
+
+    @Override
+    public int getMinHeight(World world) {
+        return world.getMinHeight();
+    }
+
+    @Override
+    public boolean supportsCustomBiomes() {
+        return true;
+    }
+
+    @Override
+    public int getTrueBiomeBaseId(Object biomeBase) {
+        return getCustomBiomeRegistry().getId(((Holder<net.minecraft.world.level.biome.Biome>) biomeBase).value());
+    }
+
+    @Override
+    public Object getTrueBiomeBase(Location location) {
+        return ((CraftWorld) location.getWorld()).getHandle().getBiome(new BlockPos(location.getBlockX(), location.getBlockY(), location.getBlockZ()));
+    }
+
+    @Override
+    public String getTrueBiomeBaseKey(Location location) {
+        return getKeyForBiomeBase(getTrueBiomeBase(location));
+    }
+
+    @Override
+    public Object getCustomBiomeBaseFor(String mckey) {
+        return getCustomBiomeRegistry().getValue(ResourceLocation.parse(mckey));
+    }
+
+    @Override
+    public Object getCustomBiomeBaseHolderFor(String mckey) {
+        return getCustomBiomeRegistry().get(getTrueBiomeBaseId(getCustomBiomeRegistry().get(ResourceLocation.parse(mckey)))).orElse(null);
+    }
+
+    public int getBiomeBaseIdForKey(String key) {
+        return getCustomBiomeRegistry().getId(getCustomBiomeRegistry().get(ResourceLocation.parse(key)).map(Holder::value).orElse(null));
+    }
+
+    @Override
+    public String getKeyForBiomeBase(Object biomeBase) {
+        return getCustomBiomeRegistry().getKey((net.minecraft.world.level.biome.Biome) biomeBase).getPath(); // something, not something:something
+    }
+
+    @Override
+    public Object getBiomeBase(World world, Biome biome) {
+        return biomeToBiomeBase(((CraftWorld) world).getHandle()
+                .registryAccess().lookup(Registries.BIOME).orElse(null), biome);
+    }
+
+    @Override
+    public Object getBiomeBase(Object registry, Biome biome) {
+        Object v = baseBiomeCache.get(biome);
+
+        if (v != null) {
+            return v;
+        }
+        //noinspection unchecked
+        v = biomeToBiomeBase((Registry<net.minecraft.world.level.biome.Biome>) registry, biome);
+        if (v == null) {
+            // Ok so there is this new biome name called "CUSTOM" in Paper's new releases.
+            // But, this does NOT exist within CraftBukkit which makes it return an error.
+            // So, we will just return the ID that the plains biome returns instead.
+            //noinspection unchecked
+            return biomeToBiomeBase((Registry<net.minecraft.world.level.biome.Biome>) registry, Biome.PLAINS);
+        }
+        baseBiomeCache.put(biome, v);
+        return v;
+    }
+
+    @Override
+    public KList<Biome> getBiomes() {
+        return new KList<>(Biome.values()).qadd(Biome.CHERRY_GROVE).qdel(Biome.CUSTOM);
+    }
+
+    @Override
+    public boolean isBukkit() {
+        return true;
+    }
+
+    @Override
+    public int getBiomeId(Biome biome) {
+        for (World i : Bukkit.getWorlds()) {
+            if (i.getEnvironment().equals(World.Environment.NORMAL)) {
+                Registry<net.minecraft.world.level.biome.Biome> registry = ((CraftWorld) i).getHandle().registryAccess().lookup(Registries.BIOME).orElse(null);
+                return registry.getId((net.minecraft.world.level.biome.Biome) getBiomeBase(registry, biome));
+            }
+        }
+
+        return biome.ordinal();
+    }
+
+    private MCAIdMap<net.minecraft.world.level.biome.Biome> getBiomeMapping() {
+        return biomeMapCache.aquire(() -> new MCAIdMap<>() {
+            @NotNull
+            @Override
+            public Iterator<net.minecraft.world.level.biome.Biome> iterator() {
+                return getCustomBiomeRegistry().iterator();
+            }
+
+            @Override
+            public int getId(net.minecraft.world.level.biome.Biome paramT) {
+                return getCustomBiomeRegistry().getId(paramT);
+            }
+
+            @Override
+            public net.minecraft.world.level.biome.Biome byId(int paramInt) {
+                return (net.minecraft.world.level.biome.Biome) getBiomeBaseFromId(paramInt);
+            }
+        });
+    }
+
+    @NotNull
+    private MCABiomeContainer getBiomeContainerInterface(MCAIdMap<net.minecraft.world.level.biome.Biome> biomeMapping, MCAChunkBiomeContainer<net.minecraft.world.level.biome.Biome> base) {
+        return new MCABiomeContainer() {
+            @Override
+            public int[] getData() {
+                return base.writeBiomes();
+            }
+
+            @Override
+            public void setBiome(int x, int y, int z, int id) {
+                base.setBiome(x, y, z, biomeMapping.byId(id));
+            }
+
+            @Override
+            public int getBiome(int x, int y, int z) {
+                return biomeMapping.getId(base.getBiome(x, y, z));
+            }
+        };
+    }
+
+    @Override
+    public MCABiomeContainer newBiomeContainer(int min, int max) {
+        MCAChunkBiomeContainer<net.minecraft.world.level.biome.Biome> base = new MCAChunkBiomeContainer<>(getBiomeMapping(), min, max);
+        return getBiomeContainerInterface(getBiomeMapping(), base);
+    }
+
+    @Override
+    public MCABiomeContainer newBiomeContainer(int min, int max, int[] data) {
+        MCAChunkBiomeContainer<net.minecraft.world.level.biome.Biome> base = new MCAChunkBiomeContainer<>(getBiomeMapping(), min, max, data);
+        return getBiomeContainerInterface(getBiomeMapping(), base);
+    }
+
+    @Override
+    public int countCustomBiomes() {
+        AtomicInteger a = new AtomicInteger(0);
+
+        getCustomBiomeRegistry().keySet().forEach((i) -> {
+            if (i.getNamespace().equals("minecraft")) {
+                return;
+            }
+
+            a.incrementAndGet();
+            Iris.debug("Custom Biome: " + i);
+        });
+
+        return a.get();
+    }
+
+    public boolean supportsDataPacks() {
+        return true;
+    }
+
+    public void setBiomes(int cx, int cz, World world, Hunk<Object> biomes) {
+        LevelChunk c = ((CraftWorld) world).getHandle().getChunk(cx, cz);
+        biomes.iterateSync((x, y, z, b) -> c.setBiome(x, y, z, (Holder<net.minecraft.world.level.biome.Biome>) b));
+        c.markUnsaved();
+    }
+
+    @Override
+    public void forceBiomeInto(int x, int y, int z, Object somethingVeryDirty, ChunkGenerator.BiomeGrid chunk) {
+        try {
+            ChunkAccess s = (ChunkAccess) getFieldForBiomeStorage(chunk).get(chunk);
+            Holder<net.minecraft.world.level.biome.Biome> biome = (Holder<net.minecraft.world.level.biome.Biome>) somethingVeryDirty;
+            s.setBiome(x, y, z, biome);
+        } catch (IllegalAccessException e) {
+            Iris.reportError(e);
+            e.printStackTrace();
+        }
+    }
+
+    private Field getFieldForBiomeStorage(Object storage) {
+        Field f = biomeStorageCache;
+
+        if (f != null) {
+            return f;
+        }
+        try {
+            f = storage.getClass().getDeclaredField("biome");
+            f.setAccessible(true);
+            return f;
+        } catch (Throwable e) {
+            Iris.reportError(e);
+            e.printStackTrace();
+            Iris.error(storage.getClass().getCanonicalName());
+        }
+
+        biomeStorageCache = f;
+        return null;
+    }
+
+    @Override
+    public MCAPaletteAccess createPalette() {
+        MCAIdMapper<BlockState> registry = registryCache.aquireNasty(() -> {
+            Field cf = net.minecraft.core.IdMapper.class.getDeclaredField("tToId");
+            Field df = net.minecraft.core.IdMapper.class.getDeclaredField("idToT");
+            Field bf = net.minecraft.core.IdMapper.class.getDeclaredField("nextId");
+            cf.setAccessible(true);
+            df.setAccessible(true);
+            bf.setAccessible(true);
+            net.minecraft.core.IdMapper<BlockState> blockData = Block.BLOCK_STATE_REGISTRY;
+            int b = bf.getInt(blockData);
+            Object2IntMap<BlockState> c = (Object2IntMap<BlockState>) cf.get(blockData);
+            List<BlockState> d = (List<BlockState>) df.get(blockData);
+            return new MCAIdMapper<BlockState>(c, d, b);
+        });
+        MCAPalette<BlockState> global = globalCache.aquireNasty(() -> new MCAGlobalPalette<>(registry, ((CraftBlockData) AIR).getState()));
+        MCAPalettedContainer<BlockState> container = new MCAPalettedContainer<>(global, registry,
+                i -> ((CraftBlockData) NBTWorld.getBlockData(i)).getState(),
+                i -> NBTWorld.getCompound(CraftBlockData.fromData(i)),
+                ((CraftBlockData) AIR).getState());
+        return new MCAWrappedPalettedContainer<>(container,
+                i -> NBTWorld.getCompound(CraftBlockData.fromData(i)),
+                i -> ((CraftBlockData) NBTWorld.getBlockData(i)).getState());
+    }
+
+    @Override
+    public void injectBiomesFromMantle(Chunk e, Mantle mantle) {
+        ChunkAccess chunk = ((CraftChunk) e).getHandle(ChunkStatus.FULL);
+        AtomicInteger c = new AtomicInteger();
+        AtomicInteger r = new AtomicInteger();
+        mantle.iterateChunk(e.getX(), e.getZ(), MatterBiomeInject.class, (x, y, z, b) -> {
+            if (b != null) {
+                if (b.isCustom()) {
+                    chunk.setBiome(x, y, z, getCustomBiomeRegistry().get(b.getBiomeId()).get());
+                    c.getAndIncrement();
+                } else {
+                    chunk.setBiome(x, y, z, (Holder<net.minecraft.world.level.biome.Biome>) getBiomeBase(e.getWorld(), b.getBiome()));
+                    r.getAndIncrement();
+                }
+            }
+        });
+    }
+
+    public ItemStack applyCustomNbt(ItemStack itemStack, KMap<String, Object> customNbt) throws IllegalArgumentException {
+        if (customNbt != null && !customNbt.isEmpty()) {
+            net.minecraft.world.item.ItemStack s = CraftItemStack.asNMSCopy(itemStack);
+
+            try {
+                net.minecraft.nbt.CompoundTag tag = TagParser.parseCompoundFully((new JSONObject(customNbt)).toString());
+                tag.merge(s.getOrDefault(DataComponents.CUSTOM_DATA, CustomData.EMPTY).getUnsafe());
+                s.set(DataComponents.CUSTOM_DATA, CustomData.of(tag));
+            } catch (CommandSyntaxException var5) {
+                throw new IllegalArgumentException(var5);
+            }
+
+            return CraftItemStack.asBukkitCopy(s);
+        } else {
+            return itemStack;
+        }
+    }
+
+    public void inject(long seed, Engine engine, World world) throws NoSuchFieldException, IllegalAccessException {
+        var chunkMap = ((CraftWorld)world).getHandle().getChunkSource().chunkMap;
+        var worldGenContextField = getField(chunkMap.getClass(), WorldGenContext.class);
+        worldGenContextField.setAccessible(true);
+        var worldGenContext = (WorldGenContext) worldGenContextField.get(chunkMap);
+        var dimensionType = chunkMap.level.dimensionTypeRegistration().unwrapKey().orElse(null);
+        if (dimensionType != null && !dimensionType.location().getNamespace().equals("iris"))
+            Iris.error("Loaded world %s with invalid dimension type! (%s)", world.getName(), dimensionType.location().toString());
+
+        var newContext = new WorldGenContext(
+                worldGenContext.level(), new IrisChunkGenerator(worldGenContext.generator(), seed, engine, world),
+                worldGenContext.structureManager(), worldGenContext.lightEngine(), worldGenContext.mainThreadExecutor(), worldGenContext.unsavedListener());
+
+        worldGenContextField.set(chunkMap, newContext);
+    }
+
+    public Vector3d getBoundingbox(org.bukkit.entity.EntityType entity) {
+        Field[] fields = EntityType.class.getDeclaredFields();
+        for (Field field : fields) {
+            if (Modifier.isStatic(field.getModifiers()) && field.getType().equals(EntityType.class)) {
+                try {
+                    EntityType entityType = (EntityType) field.get(null);
+                    if (entityType.getDescriptionId().equals("entity.minecraft." + entity.name().toLowerCase())) {
+                        Vector<Float> v1 = new Vector<>();
+                        v1.add(entityType.getHeight());
+                        entityType.getDimensions();
+                        Vector3d box = new Vector3d( entityType.getWidth(), entityType.getHeight(),  entityType.getWidth());
+                        //System.out.println("Entity Type: " + entityType.getDescriptionId() + ", " + "Height: " + height + ", Width: " + width);
+                        return box;
+                    }
+                } catch (IllegalAccessException e) {
+                    Iris.error("Unable to get entity dimensions!");
+                    e.printStackTrace();
+                }
+            }
+        }
+        return null;
+    }
+
+
+    @Override
+    public Entity spawnEntity(Location location,  org.bukkit.entity.EntityType type, CreatureSpawnEvent.SpawnReason reason) {
+        return ((CraftWorld) location.getWorld()).spawn(location, type.getEntityClass(), null, reason);
+    }
+
+    @Override
+    public java.awt.Color getBiomeColor(Location location, BiomeColor type) {
+        LevelReader reader = ((CraftWorld) location.getWorld()).getHandle();
+        var holder = reader.getBiome(new BlockPos(location.getBlockX(), location.getBlockY(), location.getBlockZ()));
+        var biome = holder.value();
+        if (biome == null) throw new IllegalArgumentException("Invalid biome: " + holder.unwrapKey().orElse(null));
+
+        int rgba = switch (type) {
+            case FOG -> biome.getFogColor();
+            case WATER -> biome.getWaterColor();
+            case WATER_FOG -> biome.getWaterFogColor();
+            case SKY -> biome.getSkyColor();
+            case FOLIAGE -> biome.getFoliageColor();
+            case GRASS -> biome.getGrassColor(location.getBlockX(), location.getBlockZ());
+        };
+        if (rgba == 0) {
+            if (BiomeColor.FOLIAGE == type && biome.getSpecialEffects().getFoliageColorOverride().isEmpty())
+                return null;
+            if (BiomeColor.GRASS == type && biome.getSpecialEffects().getGrassColorOverride().isEmpty())
+                return null;
+        }
+        return new Color(rgba, true);
+    }
+
+    private static Field getField(Class<?> clazz, Class<?> fieldType) throws NoSuchFieldException {
+        try {
+            for (Field f : clazz.getDeclaredFields()) {
+                if (f.getType().equals(fieldType))
+                    return f;
+            }
+            throw new NoSuchFieldException(fieldType.getName());
+        } catch (NoSuchFieldException var4) {
+            Class<?> superClass = clazz.getSuperclass();
+            if (superClass == null) {
+                throw var4;
+            } else {
+                return getField(superClass, fieldType);
+            }
+        }
+    }
+
+    public static Holder<net.minecraft.world.level.biome.Biome> biomeToBiomeBase(Registry<net.minecraft.world.level.biome.Biome> registry, Biome biome) {
+        return registry.getOrThrow(ResourceKey.create(Registries.BIOME, CraftNamespacedKey.toMinecraft(biome.getKey())));
+    }
+
+    @Override
+    public DataVersion getDataVersion() {
+        return DataVersion.V1213;
+    }
+
+    @Override
+    public int getSpawnChunkCount(World world) {
+        var radius = Optional.ofNullable(world.getGameRuleValue(GameRule.SPAWN_CHUNK_RADIUS))
+                .orElseGet(() -> world.getGameRuleDefault(GameRule.SPAWN_CHUNK_RADIUS));
+        if (radius == null) throw new IllegalStateException("GameRule.SPAWN_CHUNK_RADIUS is null!");
+        return (int) Math.pow(2 * radius + 1, 2);
+    }
+
+    @Override
+    public KList<String> getStructureKeys() {
+        KList<String> keys = new KList<>();
+
+        var registry = registry().lookup(Registries.STRUCTURE).orElse(null);
+        if (registry == null) return keys;
+        registry.keySet().stream().map(ResourceLocation::toString).forEach(keys::add);
+        registry.getTags()
+                .map(HolderSet.Named::key)
+                .map(TagKey::location)
+                .map(ResourceLocation::toString)
+                .map(s -> "#" + s)
+                .forEach(keys::add);
+
+        return keys;
+    }
+
+    @Override
+    @SneakyThrows
+    public AutoClosing injectLevelStems() {
+        if (!dataContextLock.tryLock()) throw new IllegalStateException("Failed to inject data context!");
+
+        var server = ((CraftServer) Bukkit.getServer());
+        var field = getField(MinecraftServer.class, WorldLoader.DataLoadContext.class);
+        var nmsServer = server.getServer();
+        var old = nmsServer.worldLoader;
+
+        field.setAccessible(true);
+        field.set(nmsServer, dataLoadContext.aquire(() -> new WorldLoader.DataLoadContext(
+                old.resources(),
+                old.dataConfiguration(),
+                old.datapackWorldgen(),
+                createRegistryAccess(old.datapackDimensions(), false, true, true, true)
+        )));
+
+        return new AutoClosing(() -> {
+            field.set(nmsServer, old);
+            dataContextLock.unlock();
+        });
+    }
+
+    @Override
+    @SneakyThrows
+    public AutoClosing injectUncached(boolean overworld, boolean nether, boolean end) {
+        var reg = registry();
+        var field = getField(RegistryAccess.ImmutableRegistryAccess.class, Map.class);
+        field.setAccessible(true);
+
+        var access = createRegistryAccess(((CraftServer) Bukkit.getServer()).getServer().worldLoader.datapackDimensions(), true, overworld, nether, end);
+        var injected = access.lookupOrThrow(Registries.LEVEL_STEM);
+        var old = (Map<ResourceKey<? extends Registry<?>>, Registry<?>>) field.get(reg);
+        var fake = new HashMap<>(old);
+        fake.put(Registries.LEVEL_STEM, injected);
+        field.set(reg, fake);
+
+        return new AutoClosing(() -> field.set(reg, old));
+    }
+
+    @Override
+    public boolean missingDimensionTypes(boolean overworld, boolean nether, boolean end) {
+        var registry = registry().lookupOrThrow(Registries.DIMENSION_TYPE);
+        if (overworld) overworld = !registry.containsKey(createIrisKey(LevelStem.OVERWORLD));
+        if (nether) nether = !registry.containsKey(createIrisKey(LevelStem.NETHER));
+        if (end) end = !registry.containsKey(createIrisKey(LevelStem.END));
+        return overworld || nether || end;
+    }
+
+    @Override
+    public void removeCustomDimensions(World world) {
+        ((CraftWorld) world).getHandle().L.customDimensions = null;
+    }
+
+    private RegistryAccess.Frozen createRegistryAccess(RegistryAccess.Frozen datapack, boolean copy, boolean overworld, boolean nether, boolean end) {
+        var access = registry();
+        var dimensions = access.lookupOrThrow(Registries.DIMENSION_TYPE);
+
+        var settings = new FlatLevelGeneratorSettings(
+                Optional.empty(),
+                access.lookupOrThrow(Registries.BIOME).getOrThrow(Biomes.THE_VOID),
+                List.of()
+        );
+        settings.getLayersInfo().add(new FlatLayerInfo(1, Blocks.AIR));
+        settings.updateLayers();
+
+        var source = new FlatLevelSource(settings);
+        var fake = new MappedRegistry<>(Registries.LEVEL_STEM, Lifecycle.experimental());
+        if (overworld) register(fake, dimensions, source, LevelStem.OVERWORLD);
+        if (nether) register(fake, dimensions, source, LevelStem.NETHER);
+        if (end) register(fake, dimensions, source, LevelStem.END);
+        copy(fake, datapack.lookup(Registries.LEVEL_STEM).orElse(null));
+
+        if (copy) copy(fake, access.lookupOrThrow(Registries.LEVEL_STEM));
+
+        return new RegistryAccess.Frozen.ImmutableRegistryAccess(List.of(fake)).freeze();
+    }
+
+    private void register(MappedRegistry<LevelStem> target, Registry<DimensionType> dimensions, FlatLevelSource source, ResourceKey<LevelStem> key) {
+        var loc = createIrisKey(key);
+        target.register(key, new LevelStem(
+                dimensions.get(loc).orElseThrow(() -> new IllegalStateException("Missing dimension type " + loc + " in " + dimensions.keySet())),
+                source
+        ), RegistrationInfo.BUILT_IN);
+    }
+
+    private void copy(MappedRegistry<LevelStem> target, Registry<LevelStem> source) {
+        if (source == null) return;
+        source.listElementIds().forEach(key -> {
+            var value = source.getValue(key);
+            var info = source.registrationInfo(key).orElse(null);
+            if (value != null && info != null && !target.containsKey(key))
+                target.register(key, value, info);
+        });
+    }
+
+    private ResourceLocation createIrisKey(ResourceKey<LevelStem> key) {
+        return ResourceLocation.fromNamespaceAndPath("iris", key.location().getPath());
+    }
+}

settings.gradle

@@ -30,6 +30,7 @@ rootProject.name = 'Iris'
 
 include(':core')
 include(
+        ':nms:v1_21_R4',
         ':nms:v1_21_R3',
         ':nms:v1_21_R2',
         ':nms:v1_21_R1',