{"corpus": {"categories": ["blocky", "sharp"], "volume_mm3": 47000},
 "commands": [
  {"command": "solid.box", "params": {"corner": [0, 0, 0], "length": 60, "width": 40, "height": 10, "body_name": "Steps"}},
  {"command": "solid.box", "params": {"corner": [0, 0, 10], "length": 40, "width": 40, "height": 10, "operation": "join", "targets": ["Steps"]}},
  {"command": "solid.box", "params": {"corner": [0, 0, 20], "length": 20, "width": 40, "height": 10, "operation": "join", "targets": ["Steps"]}},
  {"command": "solid.box", "params": {"corner": [45, 15, 0], "length": 10, "width": 10, "height": 10, "operation": "cut", "targets": ["Steps"]}}
 ]}