{
 "sources": [],
 "what": "plastic.rest, a solid rectangle 16 along x by 10 across and 3 high, on a 60 x 40 x 3 plate with no rule (no draft)",
 "source": "analytic",
 "method": "no rule, no draft: a 16 x 10 x 3 block joined on the face, wholly inside it. V = 60*40*3 + 16*10*3 = 7680. Faces: the plate's 6 and the rest's 4 sides and top",
 "body_count": 1,
 "volume_mm3": 7680.0,
 "faces": 11,
 "bbox": {
  "min": [
   0,
   0,
   0
  ],
  "max": [
   60,
   40,
   6
  ]
 }
}