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FreeCAD reminds me a little of the GIMP. Super powerful but somehow the UI is just hard to deal with.

The workflows are so much harder to remember than Gimp’s though. I find myself running back to OpenSCAD every time I give it a shot.

For simple stuff I've been pleasantly surprised by dune3d:

https://github.com/dune3d/dune3d

OpenSCAD's main problem is when you get to code of any complexity. I'm ok with the language itself (it looks procedural but is really somewhat declarative), but I keep hitting up against a brick wall with the CSG processing.

Note, however that their nightly builds are much faster, if you enable Manifold (a replacement CSG library that is much faster). In fact, a current design I'm working on wouldn't be possible if I hadn't switched to their nightly builds.

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