{
  "_comment": "The built-in legend for a painted map: what each colour means, in rock uplift (mm/yr) and erodibility, never height. It is the same schema Tools/Terrain reads (RawContent/World/Templates/Map3.legend.json in the Salty repo, with its commentary trimmed), so a painting and legend made for one tool load in the other. The optional planet block carries the numbers Planet.json holds there.",
  "image": "painted-demo.png",
  "warn_distance": 60,
  "planet": {
    "circumference_km": 100,
    "massif_wavelength_km": 7,
    "lithology_wavelength_km": 8,
    "uplift_variation": 0.30,
    "lithology": { "types": 3, "k_multipliers": [0.6, 1.0, 1.8] }
  },
  "classes": [
    { "name": "ocean",    "rgb": [ 91, 175, 185], "sea": true, "depth_m": 512 },
    { "name": "deep",     "rgb": [ 65, 165, 180], "sea": true, "depth_m": 512 },
    { "name": "shelf",    "rgb": [153, 204, 221], "sea": true, "depth_m": 120 },
    { "name": "surf",     "rgb": [221, 238, 238], "sea": true, "depth_m": 20 },

    { "name": "ice",      "derived": true, "rgb": [250, 250, 250], "uplift_mm_yr": 0.05, "k_mult": 1.0,
      "snow": true, "lithology_mix": 0 },

    { "name": "lowland",  "rgb": [153, 204, 102], "uplift_mm_yr": 0.08, "k_mult": 1.0,
      "massif": { "floor_mm_yr": 0.012, "fraction": 0.16 },
      "coastal_plain_km": 1.0, "coastal_floor_mm_yr": 0.012 },

    { "name": "highland", "rgb": [ 68, 170, 102], "uplift_mm_yr": 0.25, "k_mult": 1.0,
      "massif": { "floor_mm_yr": 0.045, "fraction": 0.30 },
      "coastal_plain_km": 4.0, "coastal_floor_mm_yr": 0.03 },

    { "name": "desert",   "rgb": [238, 221, 153], "uplift_mm_yr": 0.10, "k_mult": 0.5,
      "massif": { "floor_mm_yr": 0.015, "fraction": 0.14 },
      "coastal_plain_km": 1.5, "coastal_floor_mm_yr": 0.015 },

    { "name": "crater",   "rgb": [124, 117, 111], "uplift_mm_yr": 0.15, "k_mult": 1.5,
      "lithology_mix": 0 },

    { "name": "stroke",   "rgb": [238, 238, 238], "stroke": true, "edge_class": "ice" }
  ]
}