In article <3a04a179@news.povray.org>, "Rune" <run### [at] inamecom> 
wrote:

> > BTW I don't know why MP clamps negative values to zero.
> 
> Neither do I and I would *really* like someone to explain it to me...

Perhaps because it was intended to simulate transparency and was only 
designed to work in the range of 0-1?
As far as I can tell, MegaPOV does it the way it is supposed to work. I 
do think there needs to be a more powerful way of specifying 
transparency, and a separate way for specifying transparence in layered 
textures.

-- 
Christopher James Huff
Personal: chr### [at] maccom, http://homepage.mac.com/chrishuff/
TAG: chr### [at] tagpovrayorg, http://tag.povray.org/

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