{
  "params": {
    "wood": {
      "type": "choice",
      "options": [
        "oak",
        "pine",
        "weathered",
        "dark"
      ],
      "default": "oak",
      "label": "Wood",
      "describe": "Timber tone: oak (warm brown), pine (light, freshly built), weathered (silver-grey, veteran of many sieges), dark (tarred)."
    },
    "wheels": {
      "type": "toggle",
      "default": true,
      "label": "Wheels",
      "describe": "Four solid wooden wheels so it can be rolled into place. Off sets the frame on skids on the ground."
    },
    "ammo": {
      "type": "choice",
      "options": [
        "stone",
        "fireball",
        "none"
      ],
      "default": "stone",
      "label": "Ammo",
      "describe": "What sits in the cup: a stone, a burning fireball (glows at night), or nothing."
    },
    "size": {
      "type": "range",
      "min": 0.7,
      "max": 1.4,
      "step": 0.05,
      "default": 1,
      "label": "Size",
      "describe": "Overall scale. 1 is about 4.3 m long with a 3.4 m arm; 0.7 a light field piece, 1.4 a heavy siege engine."
    }
  },
  "presets": {
    "fire thrower": {
      "ammo": "fireball",
      "wood": "dark"
    },
    "field onager": {
      "wheels": false,
      "size": 0.8,
      "wood": "pine"
    },
    "veteran engine": {
      "wood": "weathered",
      "size": 1.2
    }
  },
  "night": {
    "fire": {
      "zone": "fire",
      "color": "#ff8a30",
      "intensity": 2,
      "describe": "The fireball in the cup burns orange."
    }
  }
}