{
  "materials": [
    { "id": "leafy-grass", "color": "Vegetations/leafy_grass/Diffuse.jpg", "normal": "Vegetations/leafy_grass/nor_gl.jpg", "roughness": "Vegetations/leafy_grass/Rough.jpg" },
    { "id": "rock-ground", "color": "Rocks/rock_ground/Diffuse.jpg", "normal": "Rocks/rock_ground/nor_gl.jpg", "roughness": "Rocks/rock_ground/Rough.jpg" },
    { "id": "gravel", "color": "Gravel/rocks_ground_05/Diffuse.jpg", "normal": "Gravel/rocks_ground_05/nor_gl.jpg", "roughness": "Gravel/rocks_ground_05/Rough.jpg" },
    { "id": "sand", "color": "Sand/coast_sand_02/Diffuse.jpg", "normal": "Sand/coast_sand_02/nor_gl.jpg", "roughness": "Sand/coast_sand_02/Rough.jpg" }
  ],
  "terrestrialFlat": ["leafy-grass"],
  "rockyFlat": ["gravel", "sand", "rock-ground"],
  "slopes": ["rock-ground", "gravel"]
}