{
    "name": "air",
    "properties": {
        "is_liquid": false,
        "is_cross_plane": false,
        "is_transparent": true,
        "is_passable": true,
        "is_discard": true,
        "is_blend": false,
        "is_transitional": false,
        "is_gas": true,
        "roughness": 1.0
    }
}