In article <39857a2e@news.povray.org>, Warp <war### [at] tagpovrayorg> 
wrote:

>   Megapov's post-processing has something like this.

It does?

Anyway, the only way I can think of to read a pixel is with 
eval_pigment() and an image_map, as was already mentioned. For writing, 
you are out of luck...the best you could do is use post_processing add, 
multiply, etc. to layer a pigment on the image.
(was that what you were talking about, Warp?)

-- 
Christopher James Huff - Personal e-mail: chr### [at] maccom
TAG(Technical Assistance Group) e-mail: chr### [at] tagpovrayorg
Personal Web page: http://homepage.mac.com/chrishuff/
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