Me all interests about Povray
http://atrey.karlin.mff.cuni.cz/~0rfelyus/

 RBezier
This patch is the last in my series of patches for POV-Ray. It extends POV-Ray
by ray tracing of trimmed rational Bezier surface patches using Bezier clipping
(as described by Nishita, Sederberg and Kakimoto).
ftp://atrey.karlin.mff.cuni.cz/pub/local/0rfelyus/povray-3.02/examples/trims-b.png

I didn't find in Povray-3.7 opportunity to create bezier patch
Good idea for creation of leaves

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