{
  "_comment": "Biome set of the island. tools/biome_layout.py reads vanilla's overworld biome parameters, sends every vanilla biome to its target below, adds the extra entries and writes the world type. Adrian's list (2026-10-28): cherry grove, mangrove swamp, deep dark, jagged peaks, lush caves, dripstone caves, basalt deltas (as a cave biome; no Nether), jungle, desert, badlands, mountain edge, plains, forest. 'Mountain edge' no longer exists (removed in 1.18); windswept hills is its closest successor.",
  "allowed": [
    "minecraft:plains",
    "minecraft:forest",
    "minecraft:cherry_grove",
    "minecraft:mangrove_swamp",
    "minecraft:jungle",
    "minecraft:desert",
    "minecraft:badlands",
    "minecraft:windswept_hills",
    "minecraft:jagged_peaks",
    "minecraft:lush_caves",
    "minecraft:dripstone_caves",
    "minecraft:deep_dark",
    "minecraft:basalt_deltas"
  ],
  "water": [
    "minecraft:ocean",
    "minecraft:deep_ocean",
    "minecraft:lukewarm_ocean",
    "minecraft:deep_lukewarm_ocean",
    "minecraft:warm_ocean",
    "minecraft:river",
    "minecraft:beach"
  ],
  "remap": {
    "minecraft:plains": "minecraft:plains",
    "minecraft:sunflower_plains": "minecraft:plains",
    "minecraft:snowy_plains": "minecraft:plains",
    "minecraft:ice_spikes": "minecraft:plains",
    "minecraft:mushroom_fields": "minecraft:plains",
    "minecraft:forest": "minecraft:forest",
    "minecraft:flower_forest": "minecraft:forest",
    "minecraft:birch_forest": "minecraft:forest",
    "minecraft:old_growth_birch_forest": "minecraft:forest",
    "minecraft:dark_forest": "minecraft:forest",
    "minecraft:taiga": "minecraft:forest",
    "minecraft:snowy_taiga": "minecraft:forest",
    "minecraft:old_growth_pine_taiga": "minecraft:forest",
    "minecraft:old_growth_spruce_taiga": "minecraft:forest",
    "minecraft:windswept_forest": "minecraft:forest",
    "minecraft:grove": "minecraft:forest",
    "minecraft:meadow": "minecraft:cherry_grove",
    "minecraft:cherry_grove": "minecraft:cherry_grove",
    "minecraft:swamp": "minecraft:mangrove_swamp",
    "minecraft:mangrove_swamp": "minecraft:mangrove_swamp",
    "minecraft:jungle": "minecraft:jungle",
    "minecraft:sparse_jungle": "minecraft:jungle",
    "minecraft:bamboo_jungle": "minecraft:jungle",
    "minecraft:desert": "minecraft:desert",
    "minecraft:savanna": "minecraft:desert",
    "minecraft:savanna_plateau": "minecraft:badlands",
    "minecraft:windswept_savanna": "minecraft:badlands",
    "minecraft:badlands": "minecraft:badlands",
    "minecraft:eroded_badlands": "minecraft:badlands",
    "minecraft:wooded_badlands": "minecraft:badlands",
    "minecraft:windswept_hills": "minecraft:windswept_hills",
    "minecraft:windswept_gravelly_hills": "minecraft:windswept_hills",
    "minecraft:snowy_slopes": "minecraft:windswept_hills",
    "minecraft:stony_shore": "minecraft:windswept_hills",
    "minecraft:jagged_peaks": "minecraft:jagged_peaks",
    "minecraft:frozen_peaks": "minecraft:jagged_peaks",
    "minecraft:stony_peaks": "minecraft:jagged_peaks",
    "minecraft:river": "minecraft:river",
    "minecraft:frozen_river": "minecraft:river",
    "minecraft:beach": "minecraft:beach",
    "minecraft:snowy_beach": "minecraft:beach",
    "minecraft:ocean": "minecraft:ocean",
    "minecraft:cold_ocean": "minecraft:ocean",
    "minecraft:frozen_ocean": "minecraft:ocean",
    "minecraft:deep_ocean": "minecraft:deep_ocean",
    "minecraft:deep_cold_ocean": "minecraft:deep_ocean",
    "minecraft:deep_frozen_ocean": "minecraft:deep_ocean",
    "minecraft:lukewarm_ocean": "minecraft:lukewarm_ocean",
    "minecraft:deep_lukewarm_ocean": "minecraft:deep_lukewarm_ocean",
    "minecraft:warm_ocean": "minecraft:warm_ocean",
    "minecraft:lush_caves": "minecraft:lush_caves",
    "minecraft:dripstone_caves": "minecraft:dripstone_caves",
    "minecraft:deep_dark": "minecraft:deep_dark"
  },
  "add": [
    {
      "_comment": "Volcanic caves under the hottest, driest land (where desert and badlands are), at cave depth like lush and dripstone caves.",
      "biome": "minecraft:basalt_deltas",
      "parameters": {
        "temperature": [0.55, 1.0],
        "humidity": [-1.0, -0.1],
        "continentalness": [-0.11, 1.0],
        "erosion": [-1.0, 1.0],
        "weirdness": [-1.0, 1.0],
        "depth": [0.2, 0.9],
        "offset": 0.0
      }
    }
  ]
}