Made a Blender add-on for cutting big models to fit the vat, with hollowing and drain holes
Flairing this properly, it is a paid add-on I made.
It started because of the two chores I hated most before a big resin print: cutting a model down to something that fits the vat, and hollowing it without ending up with a wall that is not the thickness I asked for.
What it does that is resin-specific:
- Hollow takes a wall thickness in real millimetres and gives you that wall, even when the object still carries a scale factor. I measured 19.98 mm on a 20 mm request at four different object scales
- Drain holes either automatically through the lowest wall of every part, or you click exactly where each one goes, under an arm or behind a head, where the cleanup will not show
- Cutting into vat-sized blocks, or a freehand seam you draw yourself so it hides in a fold instead of running across a face
- Every cut face gets a keyed pin and a matching socket, one corner cut off so a part cannot be glued in rotated, plus an engraved 1A / 1B pair, so a 20-part model still assembles without a guessing game
- Mesh check before you export, then STL, OBJ or 3MF in millimetres
Straight answer on the weak spot: a very thin shell cut into large blocks can produce open fragments at thin points. The built-in check tells you which parts, and a thicker wall or a smaller block fixes it. I would rather say that here than have someone find it out at 2 a.m.
Blender 4.2 and newer.
3-minute demo: https://youtu.be/nQitmn3UYoY
Have a look if it is useful to you: https://superhivemarket.com/products/3d-slicer-suite-
Questions welcome, I wrote it.