"Just wondering if the mill-figures could be cause more of the problems due to their polygon count?" animajikgraphics, It's not because of their polycount, it's due to the high res textures poser uses. as others have explained before. Vue is (and always had) having a lot of trouble when you use multiple high res textures. It uses memory very insufficient whn it comes to textures. Poser utilizes memory much more sufficiently.

Artwork and 3DToons items, create the perfect place for you toon and other figures!

http://www.renderosity.com/mod/bcs/index.php?vendor=23722

Due to the childish TOS changes, I'm not allowed to link to my other products outside of Rendo anymore :(

Food for thought.....
https://www.youtube.com/watch?v=pYZw0dfLmLk