Well, I have imported OBJs sizes from 95-110 MB. So, if you are importing your Poser models as OBJ, you can stretch the limit. Plus, bigger file size of Vue scene itself has it's toll, I'm sure you already know that. Meanwhile, Vue gets a little unstable after importing several PZ3 files, despite their sizes. So, rather then size, the question may be better said as how many PZ3s YOUR Vue can handle?