Many years ago (around 2005) when I was pretty knowledgeable about 
isosurfaces, I wrote a macro for generating isosurface landscapes. I 
introduced so many variables however, that the macro was/is almost 
impractical ;-) and so it went forgotten by the world at large.

Maybe you could glean bits and pieces from it for your rock macro? 
Essentially, my isosurface is a single iso.


-- 
Thomas

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