{
  "params": {
    "bays": {
      "type": "choice",
      "options": [
        "single",
        "triple"
      ],
      "default": "single",
      "label": "Passages",
      "describe": "single (one 5.4 m wide archway, 13.5 m wide monument) or triple (a 6.5 m central arch flanked by two 3.4 m side arches, 25.6 m wide, 21 m tall)."
    },
    "stone": {
      "type": "choice",
      "options": [
        "travertine",
        "marble",
        "sandstone",
        "grey"
      ],
      "default": "travertine",
      "label": "Stone",
      "describe": "travertine (warm cream, Rome), marble (bright white), sandstone (golden, provincial cities) or grey (weathered grey limestone)."
    },
    "attic": {
      "type": "toggle",
      "default": true,
      "label": "Attic",
      "describe": "The tall block above the cornice with a blank framed panel where a dedication would go. Off ends the arch at the cornice."
    },
    "columns": {
      "type": "toggle",
      "default": true,
      "label": "Columns",
      "describe": "Engaged columns standing on pedestals against both faces, carrying the cornice. Off leaves flat piers."
    },
    "ruin": {
      "type": "range",
      "min": 0,
      "max": 1,
      "step": 0.05,
      "default": 0,
      "label": "Ruin",
      "describe": "0 is complete. Rising values break up the attic first, then the cornice and columns, then bite into the crown of the masonry, with fallen blocks around the foot. The arches themselves always stay standing."
    }
  },
  "presets": {
    "arch of the emperor": {
      "bays": "triple",
      "stone": "marble",
      "attic": true,
      "columns": true
    },
    "forum ruin": {
      "bays": "single",
      "stone": "travertine",
      "ruin": 0.65
    },
    "provincial gate": {
      "bays": "single",
      "stone": "sandstone",
      "attic": false,
      "columns": true,
      "ruin": 0.2
    }
  },
  "night": null
}