This type of short turbulent cracks is probably more typical for old
weathered wood while cracks in freshly cut wood caused by shrinking during
drying are usually long and straight.  

It's made with a combination of patterns and a cylindrical warp, way too
slow for directly using in an isosurface. For the upper parts i used
heightfields, for the cylindical parts meshes generated with the
HF_Cylinder() macro. Since the meshes can't be CSG-ed they don't join
perfectly. 

Of course the shape looks way too clean, but it might be possible to use
the pattern in form of an image file in an isosurface without making it
unusable slow.

Christoph

-- 
POV-Ray tutorials, IsoWood include,                 
TransSkin and more: http://www.tu-bs.de/~y0013390/  
Last updated 06 Feb. 2002 _____./\/^>_*_<^\/\.______

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