I did a few renders comparing the various options you do have for importing Vue figures..... regular poser maps, SSS, Vueskin and Poser shaders enabled disabled. You can compare them and see if any is better or worse for your kind of work.

http://www.renderosity.com/mod/gallery/index.php?image_id=2428966&user_id=23722&member&np

http://www.renderosity.com/mod/gallery/index.php?image_id=2429164&user_id=23722&member&np

Then there's number 4, that can take up lot's of memory. I would first import my figures as usual and see how much memory that all takes. If it takes up lot's of memory already, then you know what the problem is and you can try steps to decrease it. You don't need to repose in vue, you can do it in poser and vue will ask you if you want to reload the figures changed. It's a bit more work, but saves memory. Shaders may say you a lot of memory as well.

But if it's not the figures taking up lot's and lot's of Gb's of ram, then you know it's the rest. Instead of painting everything, see if you can make use of dynamic ecosytems instead, that will save you a lot memory, so you have enough left to render.

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