CatPin for Blender: a $21 add-on for splitting big models into printable, connected parts
If your model is too big for the print bed, the usual workaround is messy: duplicate the mesh, run booleans, place pins by hand, lose the original, and repeat. CatPin, from AlexSokol, is a $21 Blender add-on that turns that cleanup into a more controlled workflow. It focuses on the part of printing prep that eats time: splitting a high-poly model into pieces, adding matching connectors, and exporting the final parts without rebuilding the design. With mild recent attention on the public page, it is a reasonable moment to check whether it fits your print workflow. At CatPin pricing of $21, it is an easy risk if you regularly prepare characters, busts, statues, or modular props for resin or FDM printing.
Quick answer
| Best for | Blender artists preparing large characters, busts, statues, or modular props for resin or FDM printing. |
| Skip if | You only need a one-off quick slice with no connectors, or you want a free workflow and will not use Draft Mode. |
| Price | $21 |
| Format | Blender add-on with Draft and Easy cut modes |
| One-line take | A practical $21 shortcut for turning one big model into connected printable parts without rebuilding the model. |
What you’re actually buying
The core idea is simple: keep the source model intact while planning cuts that become printable parts. In Draft Mode, CatPin lets you add several cuts, edit them, disable them, or remove them before you build the final pieces. That matters when a large figure needs a split that follows the silhouette, avoids awkward supports, or leaves room for connectors. You can use straight and curved cuts to match the shape of the model instead of forcing a single clean slice.
The connector side is where the add-on earns its keep. Instead of manually modeling pins and sockets after every cut, CatPin adds matching automatic pins and sockets with controls for position, rotation, scale, width, height, type, and clearance. If you already have a connector that fits your printer, material, or design style, custom connector support lets you bring it into the workflow. That makes it useful for artists who want consistent assembly without turning every print into a separate modeling session.
When the cuts are ready, CatPin creates a collection of final parts and can export them to a selected folder with one-button export in STL, OBJ, or FBX. Easy Mode is the faster lane for simple models: draw a cut, choose connector settings, and get separated parts without Draft history. Draft Mode is the more production-minded path, especially when you need to revise the split after seeing how the parts will print.
Why it’s on our radar
About 16 ratings are showing on the public page, and there has been mild recent attention. For a niche Blender tool, that is enough signal to suggest it is not just a fresh upload with no real-world use. At $21, the price is low enough to try if your print queue regularly includes models that exceed your bed size.
What actually matters
- Check your print tolerances first: CatPin speeds up model prep, but you still need to understand material, wall thickness, connector clearance, and part orientation for your printer.
- Decide which mode fits your job: Draft Mode is better for editable, non-destructive cut planning; Easy Mode is better when the split is obvious and you want speed.
- Test the connector fit early: Adjustable clearance and custom connector support matter more than raw cut speed if the parts need to assemble cleanly.
- Expect variable processing time: The page notes high-poly models up to about 3 million polygons, with a single cut taking roughly 2 to 40 seconds depending on complexity, remesh settings, and machine speed.
Mid-check
If you print large figures, busts, or modular props and want to stop rebuilding connectors by hand, this is a practical add-on to check out. View on Gumroad
FAQ
Can CatPin keep the original model unchanged?
Yes. The workflow is built around non-destructive cut planning, so the source model can stay intact while final parts are created.
Does it only work for resin printing?
No. It is aimed at resin and FDM workflows, including artists preparing large models for smaller print beds.
What file formats can I export?
STL, OBJ, and FBX are supported.
Is Easy Mode enough for complex models?
For simple cuts, yes. For complex splits, Draft Mode gives more control because you can edit, disable, or remove cuts before finalizing the parts.
Bottom line
CatPin is not a magic fix for every print problem, but it solves a very specific pain: turning one large Blender model into connected parts without losing the original or hand-modeling every pin and socket. If you print characters, busts, statues, or modular props, the $21 price is a reasonable bet for a faster prep pass. Check CatPin pricing and download.