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I have modeled a custom part in Blender and I would like to get it into LDraw format for use in LDCad and LPub3D.

I don't know much about 3D formats, but Blender can export collada, alembic, fbx, gltf 2.0, wavefront, and x3d.

I don't need the part to properly use LDraw primitives for my purposes (and I imagine that kind of conversion isn't possible), but just to convert the mesh into the sort of tris and quads that ldraw can understand.

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In the end, I exported from blender to STL file and used http://marc.klein.free.fr/lego/stl2dat/stl2dat.html to convert to DAT. The final result worked well, and you can see the custom part used alongside regular ldraw parts in the build instructions here: https://rebrickable.com/mocs/MOC-68128/seejay/glittering-viper-rainbow-bears-starfighter/#details

The ldraw model was built in LDCad and the instructions were built in LPub3d.

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  • Thanks for the rebrickable link. The pens look great in the instructions and renders.
    – chicks
    Apr 13, 2021 at 20:53
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I think LDPartEditor can do what you want.

https://nilsschmidt1337.github.io/ldparteditor/

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  • Thanks for your answer. I somehow missed it at the time. I ended up not using that approach, but worth exploring. I'll answer the question with what I ended up doing.
    – SeeJay719
    Apr 13, 2021 at 17:13

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