{ "name" : "ramp",
  "materials" :
  { "name" : "edges",
    "paths" : [
      { "points" : [ { "x": 0.0, "y": 0.1, "z": 0.2 }, { "x": 0.0, "y": 0.1, "z": 0.2 }, ... ] },
      { "points" : [ { "x": 0.0, "y": 0.1, "z": 0.2 }, { "x": 0.0, "y": 0.1, "z": 0.2 }, ... ] }
	]
  },
  { "name" : "floor",
    "paths" : [
      { "points" : [ { "x": 0.0, "y": 0.1, "z": 0.2 }, { "x": 0.0, "y": 0.1, "z": 0.2 }, ... ],
        "normals" : [ { "x": 0.0, "y": 0.1, "z": 0.2 }, { "x": 0.0, "y": 0.1, "z": 0.2 }, ... ] }
	]
  }
}