Another alternative I just came across is a web-based CAD package called
"onshape". It allows export of stl files which can be converted to POV
meshes with stl2pov, and more importantly when exporting it allows you
to specify the parameters used when generating the mesh.
It's still in beta at the moment, and it looks like the free version
allows you to work on up to 5 projects at once.
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