[jitter] Re: sharing is fun - Math Surface Shader

I couldn't let Wes have all the fun, so here is a version that does 
Spherical Harmonics.  I also threw in my special normal-dependent 
pixel-disposal sauce to make it that much more interesting.  Try 
animating the delta value and changing the fig/thresh params.  Also, the 
sphere param mixes between a sphere and the distorted shape, and of 
course you can extrapolate.  For those of you not running the latest and 
greatest hardware, I recommend lowering the jit.matrix dims. It does 
look really nice at 500x500 though

I'm not usually a big supporter of mathematical surfaces, but I guess 
I'm beginning to see the light.

Happy Patching!

Andrew B.
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