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Wow, thats fantastic. Can I ask how the isosurface was defined ? i.e.
is it a sphere - this pattern ? Or am i way off base !
On Fri, 4 Jul 2008 21:06:51 +0100, "Tek" <tek### [at] evilsuperbrain com>
wrote:
>I was messing around with some multifractals and came up with this. It's
>based on a crackle form <1,0,0> repeated like a perlin multi-fractal over 8
>octaves. The heightfield renders pretty quick (19 minutes) but the isosurfae
>took an amazing 9 hours!
>
>Here's the code for the pattern, the Curve value adjusts how the holes look.
>Have a look at p.b.a to see what happens when I animate that value!:
>
>pigment {
> #local Curve=1/8; // small values make it look porous
> #local Omega=0.5;
> #local Lambda=2;
> #local Octaves=8;
> pigment_pattern {
> average
> pigment_map {
> #local octave=0;
> #while ( octave < Octaves )
> [pow(Omega,octave)
> pigment_pattern {
> crackle form <.9,0,0>
> scale pow(Lambda,-octave)
> colour_map {[0 rgb 1][1 rgb 0]}
> }
> poly_wave 1/Curve
> ]
> #local octave=octave+1;
> #end
> }
> }
> poly_wave Curve
> colour_map {[0 rgb 1][1 rgb 0]}
>}
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