{
  "params": {
    "shell": {
      "type": "choice",
      "options": [
        "garden",
        "amber",
        "banded",
        "chocolate"
      ],
      "default": "garden",
      "label": "Shell",
      "describe": "Shell colour: garden (mottled brown with broken dark bands), amber (golden, glassy), banded (yellow with crisp dark bands and a dark lip, a grove snail), chocolate (dark brown with a pale lip)."
    },
    "skin": {
      "type": "choice",
      "options": [
        "grey",
        "cream",
        "slate"
      ],
      "default": "grey",
      "label": "Body",
      "describe": "Body colour: grey (the usual garden snail), cream (pale), slate (dark blue-grey)."
    },
    "seed": {
      "type": "range",
      "min": 1,
      "max": 99,
      "step": 1,
      "default": 1,
      "label": "Seed",
      "describe": "Changes the shell: how many whorls (2.5 to 3.3), how far the tip sticks out, where the bands run and how the streaks fall. Same seed, same shell."
    },
    "size": {
      "type": "range",
      "min": 1,
      "max": 40,
      "step": 0.5,
      "default": 1,
      "label": "Size",
      "describe": "Uniform scale. 1 is real size (3 cm shell, 5 cm long); 10 is a 50 cm game-readable snail; 40 is a 2 m giant fantasy snail."
    }
  },
  "presets": {
    "garden snail": {
      "shell": "garden",
      "skin": "grey"
    },
    "grove snail": {
      "shell": "banded",
      "skin": "cream",
      "seed": 12
    },
    "amber snail": {
      "shell": "amber",
      "skin": "slate",
      "seed": 5
    }
  },
  "night": null
}