{
  "action": {
    "type": "biomeblends:set_biome",
    "target_biome": "minecraft:mushroom_fields"
  },
    "horizontal_radius": 128,
    "vertical_radius": 24,
    "dimension_blacklist": {
        "values": ["minecraft:overworld"],
        "negate": true
  },
    "color": 11047600,
    "use_remainder": {
        "id": "minecraft:clay_ball"
  }
}