I like the approximation better.   :-p
I work a lot with isosurfaces these times, so you can guess if I'm 
interested.

JC

Kevin Loney wrote:
> ok I finally finished this and it's relativly fast as well. there are
> a couple of modifications however but they can wait, in the mean time it can
> be downloaded from
> http://www.geocities.com/qsquared_1999/pubfiles/pubfiles.html if anyone is
> interested.
> 
> approximation.jpg took 7s to render
> real.jpg took 50s to render
> 
> f = function(x,y,z) {
>     f_sphere(x,y,z,1)+f_wrinkles(x,y,z)
> }
> 
> --
> Kevin
> http://www.geocities.com/qsquared_1999/
> #macro _(r)#if(r<12)#local i=asc(substr("oqshilacefg"
> ,r,1))-97;disc{<mod(i,7)-3,div(i,7)-1,6>,z,.4
> pigment{rgb 10}}_(r+1)#end#end _(1)//KL
>

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