news:39491122.213EA2AC@exmail.de...
|

| > : Povray told me, no csg with patches allowed.
| >
| >   That's right.
| >   It's because povray can't determine whether a point is inside a patch or
| > not.
| >
| >   Megapov can do it for triangle meshes. I wonder if it works for patches.
| >
|
| Thanks for the hint.
| I'm not familiar with megapov (what is it?). Sorry for my ignorance. Trying
to
| download it.

It will always warn but it can still do a 'difference' although it turns out
like a 'clipped_by' instead, i.e. no surface at the intersection.  This is
true in MegaPov 0.5a as well, the URL leading to MegaPov is:
http://www.nathan.kopp.com/patched.htm

Bob

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