{
  "params": {
    "livery": {
      "type": "choice",
      "options": [
        "green",
        "black",
        "red",
        "blue"
      ],
      "default": "green",
      "label": "Livery",
      "describe": "Paint scheme: green with brass trim, black with red lining, red with gold, blue with cream."
    },
    "wheels": {
      "type": "choice",
      "options": [
        "0-4-0",
        "0-6-0",
        "2-6-0"
      ],
      "default": "0-6-0",
      "label": "Wheels",
      "describe": "Wheel arrangement: 0-4-0 (small shunter, two driving axles), 0-6-0 (three coupled axles), 2-6-0 (a leading pony truck and three coupled axles, longer)."
    },
    "tender": {
      "type": "toggle",
      "default": true,
      "label": "Tender",
      "describe": "A coal and water tender coupled behind the cab. Off = a tank engine on its own."
    },
    "smoke": {
      "type": "toggle",
      "default": true,
      "label": "Smoke",
      "describe": "Smoke puffs that rise from the chimney and drift back as it drives."
    }
  },
  "presets": {
    "yard shunter": {
      "wheels": "0-4-0",
      "tender": false,
      "livery": "black"
    },
    "branch line": {
      "wheels": "0-6-0",
      "livery": "green"
    },
    "express": {
      "wheels": "2-6-0",
      "livery": "red"
    }
  },
  "night": {
    "headlamp": {
      "zone": "headlamp",
      "color": "#fff2c4",
      "intensity": 1.4,
      "describe": "The headlamps on the front buffer beam glow."
    },
    "fire": {
      "zone": "fire",
      "color": "#ff7a1e",
      "intensity": 1.6,
      "describe": "The firebox glows orange inside the cab."
    }
  }
}