Quote - I think this is rather an enlightening approach.  We may learn something new along the way.  BTW, I see in your Color_Math node explanation you are using 2 primary  and 1 secondary colors.  Have you experimented with the addition and subtraction of secondaries to see what effects you get.  Also you stated:

*Quote: what "Green" is to Poser. It's 0, 1, 0. We know that? Right? This is an absolute. To Poser, when you say "Green", it thinks 0, 1, 0.

*Is that correct?  I think Poser should interpret that as 0,255,0.  The mathematical expression of a color in it's channel should range between 0 - 255, not an on-off switch integer.

When we work with colors the 0 to 1 is the true presentation, but not binary. We mean that it goes from 0 to 1 including everything in between.

The 0 to 255 is just how we represent those colors in 8-bit integers. But Poser internally uses floating point numbers for color, not 8-bit integers.

It is the very last step in rendering to convert the number to 8-bit integer for display on the screen.

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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)