Wasn't it Matthew Pace who wrote:
>So as you know, I am stumbling through the isosurface qualities of POV, 
>when I came across a site where someone used an identifier fn_function 
>to make a pigment modifier (bozo in this case) apply to both a height 
>field and an isosurface.  Can anyone either explain this (as he didnt 
>really) or point me to a place which does?  He used this as a way to 
>make some pretty nifty landscapes, so if anyone knows of a site which 
>shows some isosurface landscaping tricks, that would be awesome too.  
>Thanks a lot, Matt

There's a section in my Isosurface Tutorial that looks at the difference
between using a function to generate a heightfield and using it to
generate an isosurface.

http://www.econym.demon.co.uk/IsoTut/patterns.htm#hf

In this case I used function{ pattern{ leopard... }} but I could have
used function{f_bozo(x,0,z)}.

-- 
Mike Williams
Gentleman of Leisure

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