{
  "version": "0.1",
  "nodes": {
    "1": {
      "id": 1,
      "name": "Bottom Cube",
      "op": { "type": "Cube", "size": { "x": 40, "y": 40, "z": 10 } }
    },
    "2": {
      "id": 2,
      "name": "Bottom Translate",
      "op": { "type": "Translate", "child": 1, "offset": { "x": -20, "y": -20, "z": 0 } }
    },
    "3": {
      "id": 3,
      "name": "Middle Cube",
      "op": { "type": "Cube", "size": { "x": 28, "y": 28, "z": 10 } }
    },
    "4": {
      "id": 4,
      "name": "Middle Translate",
      "op": { "type": "Translate", "child": 3, "offset": { "x": -14, "y": -14, "z": 10 } }
    },
    "5": {
      "id": 5,
      "name": "Top Cube",
      "op": { "type": "Cube", "size": { "x": 16, "y": 16, "z": 10 } }
    },
    "6": {
      "id": 6,
      "name": "Top Translate",
      "op": { "type": "Translate", "child": 5, "offset": { "x": -8, "y": -8, "z": 20 } }
    },
    "7": {
      "id": 7,
      "name": "Union Bottom+Middle",
      "op": { "type": "Union", "left": 2, "right": 4 }
    },
    "8": {
      "id": 8,
      "name": "Union All",
      "op": { "type": "Union", "left": 7, "right": 6 }
    }
  },
  "materials": {},
  "part_materials": {},
  "roots": [
    { "root": 8, "material": "default" }
  ]
}