Thank you Baz. You seem to be right. The poly count for the Cinema file was 31722, but the count from the obj file was 69039, so maybe the conversion has ignored all the instances, somehow that seems logical to me. Bikermouses' idea for splitting up the model is the best idea, but overall, I feel that it is not sensible to have a Poser model that is to a scale of 10,000 so I'm going to leave this model unposted. It really doesn't worry me because I learned such a lot from making it, and it is nice to know that there are limits and that I need to learn more about using Cinema to avoid this happening. My Cinema skills are very limited, so the suggestion of bad geometry doesn't surprise me at all. One thing I have noticed is that Poser hates arched windows and doors, it really screws up the textures. Maybe there should be some rules on what to do, or not to do when making models. I'm still waiting for a reply from Cinema support on that one. Thank you all.