Op 28/10/2020 om 05:03 schreef Ive:
> Am 10/28/2020 um 2:03 schrieb Kenneth:
>>

>>
> No it isn't. When using the keyword "srgb" you just tell POV-Ray that 
> the following color term is "sRGB gamma encoded".
> Multiplying any non linear color value does not only change the 
> brightness but also the hue - and is therefor plain wrong.
> 
> I haven't used POV-Ray in years and never used the srgb keyword in my 
> whole live (I switched to Adobe RGB a long time ago) so I'm not sure if 
> it will swallow this syntax but at least you should get the idea...
> 
> #declare C = (srgb <.3,.5,.7>) * 0.7;
> 

Maybe you remember the Bald Eagle / Clipka discussion in 
http://news.povray.org/povray.advanced-users/thread/%3C57894ece%241%40news.povray.org%3E/

I digested that at the time in the attached macro. I think (?) this is 
(part of) this answer...


-- 
Thomas

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