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

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