"Kenneth" <kdw### [at] gmailcom> wrote:
> I just came across a discussion by Clipka (in answer to a question by Mike
> Horwath in 2015) about LIGHT use in v3.7xx-3.8xx, when using assumed_gamma 1.0:
> "Should we use rgb or srgb colors in light sources?"
>
>
http://news.povray.org/povray.binaries.images/attachment/%3Cweb.5dc98ba0982994b4e0c1802f0%40news.povray.org%3E/clipka
s%
> 20gamma%20tutorial.pdf
>
> It is definitely worth reading, as it covers other gamma-related color topics as
> well.

[Bald Eagle wrote earlier:]
> The other issue that was brought up (somewhere, by someone) is trying to use
> sRGB values in a color map - because the color_map will interpolate linearly,
> whereas the sRGB color space is nonlinear.

Here's a link from 2010(!) that Warp posted, which I think was the initial
'seed' for the Clipka/Horwath discussion-- although it was specifically about
color-map interpolation post-v3.6xx. I made few comments there as well, but
that was at a time when I was rather dogmatic about using assumed_gamma 2.2 in a
scene. Sorry! :-O

Between Clipka and Warp with their differing viewpoints, it was a battle of epic
proportions! ;-)

http://news.povray.org/povray.beta-test/thread/%3C4d0e666b@news.povray.org%3E/

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