[aforwardslash]

> In theory, one should be able to use OpenSCAD to come up with fancy surfaces to 3-D print, right?

Yes, but it is painfully slow. Even perforated patterns are quite slow to generate.

[MengerSponge]

Aside from Fusion360, is there a Free (or FOSS) cad package that uses breps and is scriptable?

Fusion360 is just stupid fast at perforations and sophisticated modeling constructions via its python API. I use it because it works well, but I'd be happier if I didn't have to maintain that Autodesk dependency...

[dekhn]

freeCAD is brep based and scriptable.

[dheera]

OpenSCAD nightly using the Manifold engine is a lot faster than the CGAL crap the stable version ships with

[nszceta]

I am learning build123 and skipping OpenSCAD altogether

[aforwardslash]

just build it from source, its like night and day! thanks for the tip