I'm new to using photoshop for OBJ files, but I've been experimenting today. I've been creating some massive files for print. ( 56" x 32" ) and when I insert an OBJ in photoshop they always seem to have a rough pixelated edge and look seriously in need of some anti-aliasing. Initially I thought it was just a preview setting, but even when I hit "rasterize 3D" they remain pixelated. I attached an image below where you can see the problem when I zoom in at 100%