If my eval_pattern() function is added to MegaPov, I think it would also 
be a good idea to add it as an isosurface function. I have a feeling 
that evaluating the pattern directly could be much faster than 
evaluating the pigment, but I don't know the isosurface code well enough 
to add a function.

Another advantage could be the increased precision, aren't color_maps 
limited to 255 levels of color?

An alternative would be to add the ability to call the patterns as 
functions, this would require adding a function for each pattern, but 
Might be even faster. There probably isn't a significant difference in 
speed, though. And patterns which take parameters would have to have 
more than the normal 3(x, y, and z), so you couldn't use the usual 
pattern syntax. And some patterns(like my object pattern) have a syntax 
which would look pretty strange used as a function.

-- 
Chris Huff
e-mail: chr### [at] yahoocom
Web page: http://chrishuff.dhs.org/

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