{
  "params": {
    "form": {
      "type": "choice",
      "options": [
        "arch",
        "spire",
        "twin"
      ],
      "default": "arch",
      "label": "Form",
      "describe": "arch (a sweeping natural bridge you can walk under), spire (a tall hoodoo pillar with a wide cap rock), twin (two spires leaning toward each other with a gap, like a broken arch)."
    },
    "rock": {
      "type": "choice",
      "options": [
        "rust",
        "violet",
        "teal",
        "bone",
        "obsidian"
      ],
      "default": "rust",
      "label": "Rock",
      "describe": "Banded stone colour: rust (red desert), violet, teal, bone (pale chalk), obsidian (near-black glassy rock)."
    },
    "vein": {
      "type": "choice",
      "options": [
        "cyan",
        "magenta",
        "lime",
        "amber",
        "violet"
      ],
      "default": "cyan",
      "label": "Veins",
      "describe": "Colour of the glowing fissures and crystals: cyan, magenta, lime, amber, violet."
    },
    "height": {
      "type": "range",
      "min": 2,
      "max": 10,
      "step": 0.5,
      "default": 4.5,
      "label": "Height",
      "describe": "Height in metres. 2 is a waist-to-head-high outcrop, 4.5 an arch a vehicle drives under, 10 a canyon landmark."
    },
    "seed": {
      "type": "range",
      "min": 1,
      "max": 50,
      "step": 1,
      "default": 5,
      "label": "Seed",
      "describe": "Changes the lumps, lean, band pattern and where crystals break out. Same seed, same formation."
    }
  },
  "presets": {
    "red canyon arch": {
      "form": "arch",
      "rock": "rust",
      "vein": "amber",
      "height": 7
    },
    "obsidian spire": {
      "form": "spire",
      "rock": "obsidian",
      "vein": "magenta",
      "seed": 14
    },
    "broken gate": {
      "form": "twin",
      "rock": "violet",
      "vein": "lime",
      "seed": 22
    }
  },
  "night": {
    "vein": {
      "zone": "vein",
      "intensity": 1.5,
      "describe": "Rock fissures and crystal clusters glow in the vein colour after dark."
    }
  }
}