{
  "params": {
    "span": {
      "type": "range",
      "min": 12,
      "max": 48,
      "step": 2,
      "default": 24,
      "label": "Span",
      "describe": "Length of the bridge in metres between its end arches. Longer spans add piers, roughly one every 16 m, and arch and bow a little more."
    },
    "planting": {
      "type": "range",
      "min": 0,
      "max": 1,
      "step": 0.1,
      "default": 0.6,
      "label": "Planting",
      "describe": "How full the planters are. 0 is lawn and a few shrubs, 0.5 a tree every few metres, 1 a dense linear forest."
    },
    "railing": {
      "type": "choice",
      "options": [
        "glass",
        "timber",
        "cable"
      ],
      "default": "glass",
      "label": "Railing",
      "describe": "Outer railing: glass (clear panels with a timber handrail), timber (posts and rails), cable (slim white posts with steel cables)."
    },
    "seed": {
      "type": "range",
      "min": 1,
      "max": 50,
      "step": 1,
      "default": 9,
      "label": "Seed",
      "describe": "Shuffles where trees and shrubs stand, their sizes and colours, and which trees are in pink blossom."
    }
  },
  "presets": {
    "high line": {
      "span": 40,
      "planting": 0.9,
      "railing": "timber",
      "seed": 14
    },
    "glass skywalk": {
      "span": 18,
      "planting": 0.3,
      "railing": "glass",
      "seed": 4
    },
    "blossom crossing": {
      "span": 28,
      "planting": 0.7,
      "railing": "cable",
      "seed": 27
    }
  },
  "night": {
    "lamp": {
      "zone": "lamp",
      "color": "#fff0c0",
      "intensity": 1.2,
      "describe": "Bollard lights along the walkway glow warm."
    }
  }
}