I love this isosurface technique of yours!

Here is an example of my tweaking. I had to increase threshold to about 
0.5 as at 0.0 nothing showed up. I replaced raw_wave by poly_wave 0.16 
for the green and by sine_wave for the other two patterns. I also played 
around with (scaled) warp {turbulence} instead of turbulence. And 
finally, I used different values of accuracy for the different 
isosurfaces. Did also a bit of work on the textures.

-- 
Thomas

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