Regarding the light thru colored glass issue...are we really talking about translucency? That is supposed to make it in c5. That w/ sss and fresnel. I would like to see some examples of this issue and solution. Here is a quick example in vue, but it may not be showing exactly what you were describing dlk30341. There are many things about the way the shaders work in carrara I don't fully understand...they are unique and I only discovered the program a couple months ago.

No need to think outside the box....
    Just make it invisible.