The difference between a prop and a figure is that with a figure some parts of it can be moved relative to other parts. If the room that you show were a prop then it would be entirely fixed, but if it were a figure then you might be able (for instance) to make the door or windows open. By the way, your room looks pretty good, except that (in the UK) the door should be 6 ft 6 ins tall by 2 ft 6 ins wide (usually) and there should be some door handles and winmdow handles. Also, for the UK at least, most external walls are either 9 inches wide if solid, or 11 inches wide if cavity walls. Yours look to be about 4 inches wide which is very unlikely for a habitable room in the western world. Back to your original question. A major problem with Poser when rendering solid objects is that its rendering engine rounds off corners which share vertices with more than one face. This is independent of the file format used. When rendering human bodies it's a feature. When rendering things with sharp corners it's a bug. Maz