I have an simple sphere shape, wrapped with an earth-map, but when I render it out, the top edge looks sliced horizontally. My project is a SD, 720x480 animation, and I have the AA set at max (5x5 + 1.5). I have done this animation before in HD and didn't have this problem, but the project I am working on at present is an SD project, so i need the animation to work in SD.
Any ideas? would motion blure smooth out the edge? and if so, at what angle do i set the shutter? It's a very slow, subtle "earth-drifting" shot, were the sphere comes at the camera, eventually filling the frame.