Carrara does bump maps; they're in a shader tree similar to Poser 5's texturing set-up. The displacement map plug-in alters the mesh; bump maps only alter the render. Carrara does collision detection well, but doesn't have a single function like dynamic cloth. There is a Poser-to-Carrara plug-in being developed, but it has to wait for the release of Poser 5 OS X version AFAIK. Carrara 3.0 should be a useful tool for Poser users who don't want to waste time using Poser's rendering functions; see the Carrara forum in the software drop-down list.