about mixing up colors and affecting hues:

when I've got A% red (for refraction) and B% blue (for reflection) and in the proposed test-setup, and nature makes C% refraction and D% reflection - both taking internal reflections into account, then

C+D < 100% (or equal to 100% without absorption)

and the result should be RGB(1) = (AC, 0, BD)

when Poser applies GC the result will be RGB(2) = ( A^g * C, 0, B^g * D) ^ (1/g)

in which ^(1/g) will leave the hue undistorted and works on the brightness only.

Comparing RGB(1) and RGB(2), the Poser GC process will affect the hue of the outcome, unless A,B,C or D = 0 (like when studying pure refraction of reflection but no mix) or when A=B as in BB's test setup (set to 50% aka 128).

Note: for A and B in the same order of magnitude and C>>D as in the test-setup, the hue for RGB(1) will be about (1, 0, (B/A)*(D/C)) while the hue for RGB(2) will be about (1, 0, (B/A)^g * (D/C) ) . So for C (95%)>> D (5%) > 0 the hue only will remain unaffected when A=B als 1^g = 1 for all g.

Which illustrates that GC affects Fresnel (etc). The results are too bright, the relection to refraction ratios are distorted, and I don't have a clue how to correct for it. 

 

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Usually I'm wrong. But to be effective and efficient, I don't need to be correct or accurate.

visit www.aRtBeeWeb.nl (works) or Missing Manuals (tutorials & reviews) - both need an update though