FWIW, I've been using Back Alley for a few renders and it does seem to be pretty hard on the system. My system isn't the best for 3d, but it isn't all that bad either. Seems like it will nearly always render if texture filtering is shut off. In order to use texture filtering I had to shut textures down to 1048. (Your milage may vary) In Poser 6's favor, it did give me the message about not being able to complete the render instead of locking up, like P5. I did appreciate the second chance at saving the scene before continuing. :-)