Here are a few macros for manipulating height fields. You can find a 
pigment's edges with a proximity function, and map angles for special 
effects. There is also a helper pigment for placing height fields onto 
planes smoothly. Example scenes with comments are included. Works with 
versions 3.6 and 3.7. See p.b.images for some example shots.

Happy Raytracing!

Sam

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Download 'hf_tools.zip' (379 KB)