# Biomes & Structures

In order to not destroy any trees in custom biomes, Separated Leaves does not separate leaves in unknown biomes. Separated Leaves only works in biomes using a namespace that have registered at least one rule. This means that if a mod only adds biomes with existing trees, the biomes won't get recognized by Separated Leaves as there are no rules regarding custom trees. To fix this, add an empty rule.

{
  "leaves": [],
  "logs": []
}

This way, all leaves in custom biomes of the namespace will work correctly.

If you wish to blacklist a biome, you can add it to the tag data/separated_leaves/tags/worldgen/biome/allow_mismatched_leaves.json.

For every namespace you add files for, you need to provide a biomes.json file alongside the other files. In there, you can specify which biomes should be added to the mod.

If all is set to true, Separated Leaves will work in any biome with the namespace.

{
  "all": true
}

If you need to specify certain biomes, set all to false and use the biomes list.

{
  "all": false,
  "biomes": [
    "minecraft:plains",
    "minecraft:taiga"
  ]
}