Monrovilloe, that AT-AT shot has gone through a lot of changes since i posted that clip. The AT-AT doesn't fall and the background has been completely changed (sorry Vaderios, but you matte no longer features in ESB:R)

As for the changing clouds/ light direction, well i'm not going to be doing anything about that. It's just too much work and it hasn't really bothered me

And there is nothing i can do about the bottom of the speeder because the trooper who stands in front of it as it lifts off & all the background troops are partially covered by the underside box and there wouldn't be any way i could replace the missing sections