The advantage of Poser 5 for Vue is this - while Vue doesn't fully read procedural materials, it does at least read colour correctly and makes a stab at bumps and reflectivity (but not reflection maps). So it is possible to set up textures in Poser that need little or no tweaking in Vue; of course, Vue reads in texture maps complete with masking colour as well. Now, setting up any sort of materials in Poser 4 is so unpleasant as not to be borne. And once you have one material zone done, there's no way in P4 to copy that material to the next one. You can use MAT files, but (a) they stunt your creativity because you get to rely on them, and (b) they overburden the crappy P4 library system which was not designed to hold hundreds of files. P5 provides you with an environment in which basic texturing (ignoring complex procedurals) is reasonably painless, and MAT files can be managed sensibly in the P5 library. I have two big projects on the go at the moment, one in Bryce and one in Vue. For the Bryce one I'm forced to use P4, but actually it's OK anyway. The Vue one I really could not manage without P5.