Now the importance of context (surroundings) is shown.

I add a blue glow, similar to atmospheric glow.

Guess what - the yellow and red are not those colors at all. Everything is mostly blue - go ahead and measure them. Blue is the brightest of the three RGB values nearly everywhere in this render. (Perhaps it is everywhere - I did not sample every pixel.)

Despite the fact that I'm shown mostly blue, I distinctly "see" yellow and red.

 

 

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Renderosity forum reply notifications are wonky. If I read a follow-up in a thread, but I don't myself reply, then notifications no longer happen AT ALL on that thread. So if I seem to be ignoring a question, that's why. (Updated September 23, 2019)