Hi all...

I realized that normally, before a traced ray is displayed on
screen it may have any color, not only in the interval between
[0...1] but also a color like <-20,0,20> (if using negative
lightsources or such colors of a pigment). I think it is computed
as a real-number and when it schould be displayed it is clipped
to the interval [0..1] and then mapped to our visible 256 Colors
for each channel...

I read something about a colormatrix that is available in MP, and
I would know, when it is applied to a ray... If it is applied,
before the clipping, there would be nice effects available...
I would hope so, but I think it is applied in the postprocess,
when the ray-values are already clipped, and so some information
would be lost ...

Hmmm ... am I right ???


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 ,',    Jan Walzer      \V/  http://wa.lzer.net     ,',
',','   student of      >|<  mailto:jan### [at] lzernet ',','
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In article <396a181c@news.povray.org>, "Jan Walzer" 
<wal### [at] informatikuni-hallede> wrote:

> I read something about a colormatrix that is available in MP, and
> I would know, when it is applied to a ray... If it is applied,
> before the clipping, there would be nice effects available...
> I would hope so, but I think it is applied in the postprocess,
> when the ray-values are already clipped, and so some information
> would be lost ...

Yes and no. It is applied in the post_process stage, but it uses 
non-clipped color values. You can clip the colors yourself though, using 
the clip_colors post_process filter.

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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/
TAG Web page: http://tag.povray.org/

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