{
  "params": {
    "biome": {
      "type": "choice",
      "options": [
        "desert",
        "grass",
        "snow",
        "rock",
        "volcanic",
        "alien"
      ],
      "default": "desert",
      "label": "Biome",
      "describe": "Rock colours shared with every Terrain piece: desert (banded red-orange sandstone), grass (grey stone with turf on top), snow (blue-grey under snow), rock (bare grey with moss), volcanic (black basalt), alien (blue stone)."
    },
    "span": {
      "type": "range",
      "min": 3,
      "max": 10,
      "step": 0.5,
      "default": 6,
      "label": "Span",
      "describe": "Distance between the feet in metres (the opening is a bit narrower)."
    },
    "shape": {
      "type": "choice",
      "options": [
        "round",
        "tall",
        "flat"
      ],
      "default": "round",
      "label": "Shape",
      "describe": "round (classic arch about 0.6 of the span high), tall (a pointed, nearly span-high window) or flat (a low natural bridge)."
    },
    "thickness": {
      "type": "range",
      "min": 0.6,
      "max": 1.5,
      "step": 0.1,
      "default": 1,
      "label": "Thickness",
      "describe": "How massive the rock is: 0.6 is a delicate fin about to fall, 1.5 a heavy buttressed span."
    },
    "seed": {
      "type": "range",
      "min": 1,
      "max": 50,
      "step": 1,
      "default": 5,
      "label": "Seed",
      "describe": "Changes the weathering, the lean of the legs and the rubble."
    }
  },
  "presets": {
    "delicate arch": {
      "span": 5,
      "shape": "tall",
      "thickness": 0.7
    },
    "stone bridge": {
      "span": 9,
      "shape": "flat",
      "thickness": 1.3,
      "biome": "grass"
    },
    "frozen gate": {
      "biome": "snow",
      "span": 4,
      "seed": 12
    }
  },
  "night": {
    "lava": {
      "zone": "lava",
      "color": "#ff7a1a",
      "intensity": 1.6,
      "describe": "Lava (volcanic biome) and ember cracks glow orange."
    },
    "glow": {
      "zone": "glow",
      "intensity": 1.2,
      "describe": "Alien liquid, bulb plants and crystals glow in their own teal and pink."
    }
  }
}