oooh. Actually that's a good point. When you render very large scenes, your resolution is tied down by only being able to fit it into 4GB, isn't it? For instance, TG2 crashes if I try to render more than 8000 pixels in width. So until we get 64bit we have to crop. I can render to about 7750 without it crashing. Even if it's just the default scene pointed at the floor.