Biome Documentation - minecraft:overworld_generation_rules

Controls how this biome is instantiated (and then potentially modified) during world generation of the overworld.

Note

This is a pre-Caves and Cliffs component and is unused for custom biomes.

Biome Overworld Generation Rules Properties

Name	Default Value	Type	Description
generate_for_climates	not set	String	Controls the world generation climate categories that this biome can spawn for.
hills_transformation	not set	Array of strings	An array of any size containing arrays of exactly two elements.
hills_transformation (as String)	not set	String
mutate_transformation	not set	Array of strings	What biome to switch to when converting to a mutated biome
mutate_transformation (as String)	not set	String
river_transformation	not set	Array of strings	What biome to switch to when converting to a river biome (if not the Vanilla 'river' biome)
river_transformation (as String)	not set	String
shore_transformation	not set	Array of strings	What biome to switch to when adjacent to an ocean biome
shore_transformation (as String)	not set	String

generate_for_climates

Controls the world generation climate categories that this biome can spawn for. Each entry is an array of [climate_name, weight] where climate_name is 'medium', 'warm', 'lukewarm', 'cold', or 'frozen'.

hills_transformation

An array of any size containing arrays of exactly two elements. For each contained array, the first element is a climate category string ('medium', 'warm', 'lukewarm', 'cold', or 'frozen'). The second element is a positive integer for how much that entry is weighted relative to other entries.