diff --git a/iris.overworld/dimensions/overworld.json b/iris.overworld/dimensions/overworld.json
index 5e5a89e6..670f8f9f 100644
--- a/iris.overworld/dimensions/overworld.json
+++ b/iris.overworld/dimensions/overworld.json
@@ -11,10 +11,6 @@
     "seaZoom": 4,
     "interpolationFunction": "BICUBIC",
     "interpolationScale": 12,
-    "interpolationSurfaceFunction": "BICUBIC",
-    "interpolationSurfaceScale": 12,
-    "interpolationAuxiliaryFunction": "BILINEAR",
-    "interpolationAuxiliaryScale": 4,
     "hermiteTension": 0.00001,
     "hermiteBias": 0.5,
     "roughnessHeight": 0,