What it is
A biome selector picks one biome for every place in the world. A constant selector uses the same biome everywhere; a noise split chooses between two by comparing a density with a threshold.
Made by3
Used by1
Good to know
Columns or layers
Noise Biome Split reads its density at Y = 0, so each column gets one biome. Use 3D Noise Biome Split to stack biomes, like a cave biome under a forest.
Selector or regions
World Output takes either a selector or regions, never both.