Can Cycles physically mix colours? I was trying to recreate a so-called CMY cube, which is a translucid cube where opposite sides are coloured cyan, magenta, and yellow. When looked at from an angle, these colours mix, e.g.

(More pictures here).
The naive approach (namely, a cube with different shaders on each face) does not work:

Is this something Cycles can handle? (I mean, in a natural/physically realistic way; although if this is not possible, a &quot;fake&quot; solution would be interesting too.)
You should be able to do it rather easily. Just do what you already did (make each face a different color/material) - just make the material a Glass BSDF. Don't forget to turn the roughness down. You may also need to play with the individual IOR's to get the effect you need.