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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Attachments:
Download 'wood_cracka.jpg' (55 KB) Download 'wood_crackb.jpg' (77 KB)

Preview of image 'wood_cracka.jpg'

Preview of image 'wood_crackb.jpg'

Forget "cracked", this looks shattered...it wouldn't take much 
modification to make a very good bullet hole in glass or other impact 
damage to a brittle sheet, like a stone floor or ceramic armor. Splits 
in wood are usually finer and almost completely radial.

-- 
Christopher James Huff <chr### [at] maccom>
POV-Ray TAG e-mail: chr### [at] tagpovrayorg
TAG web site: http://tag.povray.org/

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Christopher James Huff wrote:
> 
> Forget "cracked", this looks shattered...it wouldn't take much
> modification to make a very good bullet hole in glass or other impact
> damage to a brittle sheet, like a stone floor or ceramic armor. Splits
> in wood are usually finer and almost completely radial.
> 

And how about:
http://news.povray.org/3a28e9f2%40news.povray.org

I know it does not yet look like that, it's just a quick try.

I thought about using it for broken glass too, but the cracks should not
be directed like here then.

Christoph

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

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The bottom image looks very good to me. At least the cut surface. Very
much like dried and sun-bleached wood.

/ Martin

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