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 "fake" solution would be interesting too.)