Well, the material room is mostly working now for me, low or hi poly figures. I ended up: Roll back the video driver. Up the minimum page file to 1GB from 768MB. (Reboot.) Defrag several of my drives, including the system and Poser partitions. Uninstall P4. Uninstall P5. (Reboot.) Upgrade the video driver again. (Reboot.) Install P5 clean. (The first time, it was a P4 upgrade.) (Reboot.) Watch P5 misbehave. Cold boot a few times. Swear loudly. (Intermittantly through the whole process.) Selecting and applying all material nodes is still a bit hit or miss, but I was able to change the material for the entire figure at least 10 times without crashes. (And that was using the DAZ dragon. Some of the unusual materials look seriously cool on the dragon, btw.) Even toon eventually worked - 2 additional reboots later. (Now I just have to get the effect I'm looking for.) I'm still having some poltergeist issues, but it's much more functional now. Thanks for the video driver idea. I think that and the fresh install (not the first time I've reinstalled it, either) fixed some issues. On the plus side, I didn't have to re-register on the re-install. Cheers!