Op 23/08/2022 om 12:52 schreef Bald Eagle:
> TdG may have code of a similar nature in his vast archive, or have other ideas
> of his own about how to approach the branch/knot aspect of the wood pattern.
> 

Not really. The best I can come up with is isowood by Christoph Hormann

http://www.imagico.de/iso_wood_en.php

Dan Hentschel and Nicolas Rougier did a couple of wood textures some 15 
years ago, Nicolas using black hole warps.

Warp has some interesting things to say, about wood, incidentally

http://warp.povusers.org/povtips/


-- 
Thomas

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