"Alain" <ele### [at] netscapenet> wrote in message 
news:443da863$1@news.povray.org...
> What about some negative pigment? or negative ambient? Those can 
darken your surrounding pixels.
> Also, if you have a recursion_limit of more than 1, pixels whiter than 
white will illuminate the 
> surrounding area more than those that are "only" white.

didn't think of all that :(

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