# IrisBiomeDecorator > A biome decorator is used for placing flowers, grass, cacti and so on ```json { "partOf": "NONE", "verticalZoom": 1, "chance": 0.1, "variance": "SCATTER", "verticalVariance": "SCATTER", "stackMax": 1, "zoom": 1, "palette": ["GRASS"], "dispersion": "SCATTER", "stackMin": 1 } ``` ## variance > The varience dispersion is used when multiple blocks are put in the palette. Scatter scrambles them, Wispy shows streak-looking varience ## dispersion > Dispersion is used to pick places to spawn. Scatter randomly places them (vanilla) or Wispy for a streak like patch system. ## verticalVariance > If this decorator has a height more than 1 this changes how it picks the height between your maxes. Scatter = random, Wispy = wavy heights ## partOf > Tells iris where this decoration is a part of. I.e. SHORE_LINE or SEA_SURFACE ## stackMin > The minimum repeat stack height (setting to 3 would stack 3 of on top of each other ## stackMax > The maximum repeat stack height ## zoom > The zoom is for zooming in or out wispy dispersions. Makes patches bigger the higher this zoom value is/ ## verticalZoom > The vertical zoom is for wispy stack heights. Zooming this in makes stack heights more slowly change over a distance ## chance > The chance for this decorator to decorate at a given X,Y coordinate. This is hit 256 times per chunk (per surface block) ## palette > The palette of blocks to pick from when this decorator needs to place.