Le 15.04.2009 15:52, scott nous fit lire :

> Going back to what POV does, the best thing POV could do is just to
> preserve the negative-ness of colour components and produce an output
> file (if using a suitable format) that reflects this. 

Here lies your main issue. The suitable format. For Pov.

If you really want to work in another colorspace, you might want to specify some
information as a spectral sampling (or whatever your color vector is based on),
instead of
some rgb, but also want to specify some interaction of matter with a ray as a matrix
(and
not only as rgbtf).
Of course, according to both your scene specification's elements and the output
format,
another adaptation of the final ray to the colorspace of the output image would be
needed.

Which lead to another option: outputting the same render in different file format at
once
(one render, ten files! ok... may be only two, a classical png and a fancy spectral
format)

The interest of the transformation matrix for interaction of ray with "pigment" is the
modeling of real effect, such as black light (UV lightwave gets divided by 2, reaching
the
visible spectrum... classical usage is a "white UV", but you can consider fancier
filter)
or some stone variable IOR according to the lightwave frequency... or worse.

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