{
  "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), dark (tarred)."
    },
    "mount": {
      "type": "choice",
      "options": [
        "tripod",
        "cart",
        "plinth"
      ],
      "default": "tripod",
      "label": "Mount",
      "describe": "tripod (three splayed legs round a pivot post, field use), cart (two wheels and a trail, can be towed), plinth (a squat stone base for a castle wall walk or tower top)."
    },
    "bolt": {
      "type": "toggle",
      "default": true,
      "label": "Bolt",
      "describe": "A loaded 1.8 m iron-tipped bolt in the slide. Off shows it unloaded."
    },
    "size": {
      "type": "range",
      "min": 0.8,
      "max": 1.6,
      "step": 0.05,
      "default": 1,
      "label": "Size",
      "describe": "Overall scale. 1 is about 3 m long and 2.6 m across the bow arms; 1.6 a heavy fortress engine."
    }
  },
  "presets": {
    "wall scorpion": {
      "mount": "plinth",
      "wood": "dark"
    },
    "field ballista": {
      "mount": "cart",
      "wood": "pine"
    },
    "fortress engine": {
      "mount": "plinth",
      "size": 1.5,
      "wood": "weathered"
    }
  },
  "night": null
}