{
  "feature": "cavernous:biomes/stone/crystal/amethyst_ceiling",
  "placement": [
    {
      "type": "minecraft:count",
      "count": 250
    },
    {
      "type": "minecraft:in_square"
    },
    {
      "type": "minecraft:height_range",
      "height": {
        "type": "minecraft:uniform",
        "min_inclusive": {
          "above_bottom": 7
        },
        "max_inclusive": {
          "absolute": 200
        }
      }
    },
    {
      "type": "minecraft:environment_scan",
      "direction_of_search": "up",
      "max_steps": 32,
      "target_condition": {
        "type": "minecraft:solid"
      },
      "allowed_search_condition": {
        "type": "minecraft:matching_blocks",
        "blocks": [
          "minecraft:air"
        ]
      }
    },
    {
      "type": "minecraft:biome"
    }
  ]
}
