{
  "params": {
    "height": {
      "type": "range",
      "min": 1.5,
      "max": 8,
      "step": 0.5,
      "default": 4,
      "label": "Height",
      "describe": "Height of the tallest strands in metres. 1.5 is a low seaweed bed, 8 a towering kelp forest; strands vary around it."
    },
    "density": {
      "type": "range",
      "min": 3,
      "max": 12,
      "step": 1,
      "default": 7,
      "label": "Density",
      "describe": "Number of kelp strands, 3 (a sparse clump) to 12 (a thick stand). The patch widens to fit them."
    },
    "colour": {
      "type": "choice",
      "options": [
        "golden",
        "olive",
        "green",
        "red"
      ],
      "default": "golden",
      "label": "Colour",
      "describe": "golden (giant brown kelp), olive (cold-water kelp), green (bright sea lettuce look) or red (red seaweed)."
    },
    "seed": {
      "type": "range",
      "min": 1,
      "max": 50,
      "step": 1,
      "default": 3,
      "label": "Seed",
      "describe": "Changes where each strand grows, how it curves and how its blades hang. Same seed always builds the same patch."
    }
  },
  "presets": {
    "giant kelp": {
      "height": 7.5,
      "density": 9,
      "colour": "golden"
    },
    "seaweed bed": {
      "height": 1.8,
      "density": 12,
      "colour": "green"
    },
    "red algae": {
      "colour": "red",
      "height": 3,
      "density": 5,
      "seed": 17
    }
  },
  "night": null
}