> Would anyone be interested in a POV-Ray macro to draw such things?

Definitely!! Very much actually, but it's usability will depend on speed,
and how closely the smooth shape corresponds to the original, intended
shape. Will hard edges that are supposed to be hard, become fully round? It
might be good with a parameter to control smoothness... Do you use a kind of
subdivision so that you stick to using triangles? Or maybe bezier patches is
preferred.

It's a great idea and I am eagerly waiting. Someone already posted code for
making "biquadratic interpolation of heightfield data"  (some time ago. You
could find the code by searching the newsgroup). It's made of quadric, cubic
and quartic patches, and consumes a LOT of memory, but works nicely, though
it's limited to heightfields.

Regards,
Hugo

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