No...first thing I did...many times.(the options I mentioned are there) There are issues. One was a memory oddness that I have seen happen with c5 if it is loaded up. Have seen it stop performing with movies, for example. I closed it out then restarted and it worked. The results still don't look good tho and another problem is it appears you can't apply it to different surfaces...all or nothing. D|S can do this fine and Carrara doesn't handle bump maps this way. So sadly,....probably will be limited use. I could try creating a plane and set it on top, but that is just silly. Makes the displacement in hex, if it cooperates, kinda useless for c5 too. Disappointing.

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