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this post was submitted on 16 Aug 2026
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FreeCAD has become pretty good lately. If you have tested it before v1.1 (March 2026) you should certainly give it a go again.
If you're fine with programming your CAD instead of visually composing it, OpenSCAD is fine as well.
I do like openscad but I must be using it wrong because it slows to a crawl when trying to array my models
Maybe you can reduce the $fn parameter while you arrange your models and increase it once you're done? That's the most common thing I encountered.
There are some config flags you can set which might improve render times, maybe play around a little.
All in all it will take a long time to create meshes because most of the compute is done on CPU. For me it's very fast once it's done rendering, so I try not to render too often.