{
  "params": {
    "height": {
      "type": "range",
      "min": 4,
      "max": 14,
      "step": 0.5,
      "default": 8,
      "label": "Height",
      "describe": "Height of the legs up to the tank floor in metres. The tank adds about 4 m. 4 is a farm tank, 14 a town landmark."
    },
    "tank": {
      "type": "choice",
      "options": [
        "drum",
        "ball",
        "box"
      ],
      "default": "drum",
      "label": "Tank",
      "describe": "Tank shape: drum (upright cylinder with a cone roof, the classic), ball (spherical tank), box (square riveted tank with a low pitched lid)."
    },
    "rust": {
      "type": "range",
      "min": 0,
      "max": 1,
      "step": 0.05,
      "default": 0.5,
      "label": "Rust",
      "describe": "Rust streaks running down the tank and rusty legs. 0 freshly painted, 1 almost entirely brown."
    },
    "paint": {
      "type": "choice",
      "options": [
        "faded blue",
        "sky",
        "red oxide",
        "cream",
        "olive"
      ],
      "default": "faded blue",
      "label": "Paint",
      "describe": "Base colour of the tank under the patches: faded blue, sky, red oxide, cream, olive."
    }
  },
  "presets": {
    "town landmark": {
      "height": 13,
      "tank": "ball",
      "paint": "sky",
      "rust": 0.3
    },
    "farm tank": {
      "height": 5,
      "tank": "box",
      "paint": "olive",
      "rust": 0.7
    },
    "rust bucket": {
      "tank": "drum",
      "rust": 1,
      "paint": "red oxide"
    }
  },
  "night": null
}