Hi Shawn,
I assume that you mean heterogeneous media support. As far as I know, currently, heterogeneous media are only possible to do in C4D R20 or with external third-party plugins. So because of this and for various other reasons, implementing this feature will be more complicated and would delay the release of the final version of Corona 3 for C4D. We will add this later, probably in Corona 4 for C4D.