I was mucking around in ZBrush (v2 is great BTW!) and exported a fairly high res mesh - 12.8 MB (13,508,496 bytes) Vertex Count 131584. I imported it into Poser(PPP & P5 same file size) and then exported it again(all export options unchecked) and the file size for this obj was 20.3 MB (21,303,647 bytes). The same original ZBrush OBJ imported/exported from UVmapper was 14.9 MB (15,674,887 bytes). I have noticed greater differences in higher res meshes - a 38mb Zbrush mesh being 50mb exported from Poser! So why the differing file sizes? I have modelled some meshes that I will eventually bone etc, for use in poser, Is there a good tutorial anywhere for optimising the mesh? Obviously I want to keep the file sizes as low as possible!