O.k. Jumping to Carrara 6.1 fixed my rendering conundrum. Now it works like it should. So apparently I did stumble in to a rendering discrepancy on Carrara 5.1 Pro that apparently is exclusive to Intel Mac UB version running on Intel. In any case

I have not see to many changes from C5 to C6, at least in the surface. I need to dive a bit more deeply in to it, but this fixing by rendering problem is worth the $ that I paid for the upgrade.

No much in to buying content and working with human figures but I am still intrigued by all this new functionality.