{
  "type": "minecraft:add",
  "argument1": -11,
  "argument2": {
    "type": "minecraft:mul",
    "argument1": {
      "type": "minecraft:y_clamped_gradient",
      "from_y": 64,
      "to_y": 80,
      "from_value": 0,
      "to_value": -10
    },
    "argument2": {
      "type": "minecraft:clamp",
      "input": {
        "type": "minecraft:add",
        "argument1": 0.3,
        "argument2": {
          "type": "minecraft:noise",
          "noise": "tectonic:underground_river/roof_sharpness",
          "xz_scale": 0.6,
          "y_scale": 0
        }
      },
      "min": 0,
      "max": 1
    }
  }
}
