hogwarden: Can you render the scene at all if you reduced the res to say 200x400 just for a test? One thing you could do is systematically remove items and see if that's the issue. For example try rendering without atmosphere or try rendering only the figures and not the background and sets. Or turn of shadows, ray trace etc. Also see if this will render in the older P4 renderer. I coincidently have a sci fi scene that will render in P4 renderer but not in fire fly and I don't know why. I gets to the rendering scene busy bar they locks indefinitly. One thing that's a real killer are morph targets. I have had a great deal of success culling my figures down to one body MT for their entire figure, one face MT and the expression MTs. If I have 4 V2 figures with all stock MTs in place then fire fly won't handle the render too well. I think poser's memory management system is nearly non-existant judging by their lack of instancing.