In article <3d90826b@news.povray.org>, "Tom Melly" <tom### [at] tomandlucouk> 
wrote:

> Your restraint is commendable ;) - an iso-surface that looks like the surface 
> of a brain?

Try messing around with functions using abs(). This:

function {pow(abs(f_noise(x, y, z)*2 - 1), 0.5)}

should be a good start. The noise function is usually "rounded" on each 
"side" of 0.5, this adjusts the range to make the lower half negative 
and then "folds" the negative part back to positive, making a bumpy, 
creased effect. The pow() function adjusts the falloff. Watch out for 
grid artifacts though

-- 
Christopher James Huff <cja### [at] earthlinknet>
http://home.earthlink.net/~cjameshuff/
POV-Ray TAG: chr### [at] tagpovrayorg
http://tag.povray.org/

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