In article <3A09C60A.E9CAEBFC@schunter.etc.tu-bs.de>, 
chr### [at] gmxde wrote:

> I already made some experiments concerning that problem, but it's 
> difficult, because the 'classical' inverse black_hole warp technique 
> does not work that well. The color of the knotholes usually differs 
> from the wood and black_hole warps are spherical while realistic 
> knotholes should have a more cylindrical shape pointing away from the 
> center of the wood pattern.  

The displace warp could be of use here...or someone could patch the 
black hole warp so the "type" keyword actually does something...

-- 
Christopher James Huff
Personal: chr### [at] maccom, http://homepage.mac.com/chrishuff/
TAG: chr### [at] tagpovrayorg, http://tag.povray.org/

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