Don't want to write this by hand? GodCraft sets minecraft:overworld_generation_rules for you with a switch.Get GodCraftOverview
minecraft:overworld_generation_rules is a biome component: it goes in the components object of a custom biome. Decides how this biome appears in the Overworld: which climates it shows up in, and which biome takes its place for hills, rivers, shores and rarer variants.
Fields
| Field | Type | Default | Description |
|---|---|---|---|
hills_transformation | minecraft:overworld_generation_rules - Weighted biome names settings | none | Biome (or weighted list of biomes) used when this biome turns into a hilly version. |
mutate_transformation | minecraft:overworld_generation_rules - Weighted biome names settings | none | Biome used when this biome turns into its rare variant. |
generate_for_climates | minecraft:overworld_generation_rules - Weighted climate categories settings[] | none | Climate groups this biome can appear in (like "medium", "warm" or "cold"), each with a weight for how often. |
river_transformation | minecraft:overworld_generation_rules - Weighted biome names settings | none | Biome used where a river runs through this biome, instead of the normal river. |
shore_transformation | minecraft:overworld_generation_rules - Weighted biome names settings | none | Biome used along the edge where this biome meets the ocean, like a beach. |
Example
Inside the components object of BP/biomes/<name>.biome.json (values are the defaults or placeholders):
BP/biomes/<name>.biome.json
{
"minecraft:overworld_generation_rules": {
"hills_transformation": "",
"mutate_transformation": "",
"generate_for_climates": [],
"river_transformation": "",
"shore_transformation": ""
}
}