I've been using NuGraf/PolyTrans to convert models into POV smooth triangle
meshes, and it's flawless... perfectly smooth.  Only problem: it's
commercial and runs about 400-500 bucks.  The problem with your 3dwin output
is that it isn't breaking the model up into enough triangles, and it isn't
creating proper surface normals... not much you can do about that, the
problem is most likely within 3dwin.

-Doug Eichenberg

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