scott <sco### [at] scottcom> wrote:
> > Yes, it will give more physically correct render for strange lights. But the
> > most important aspect of spectral rendering is more "natural" color behaviour.
> > The problem of rgb illumination model is that the primary colors are
> > "orthogonal". So when you say "blue", and "red" they have absolutely nothing in
> > common. So a red light will give no illumination to red object, and red and blue
> > objects will have no radiosity effect on each other at all.

> This is what happens IRL though, isn't it? An sRGB red light source will 
> have a very narrow spectrum and almost no overlap at all with the 
> reflective spectrum of an sRGB blue surface, so it will appear black.

OTOH if you have eg. a pure yellow light, it will look to the human eye
the same as a light with red and green frequencies in appropriate
proportions, but they will illuminate surfaces in radically different
ways. (White surfaces will look about the same under both lights, but
eg. red surfaces won't.)

-- 
                                                          - Warp

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