Adywan:
Well that shot has been changed. There is no sun behind the clouds in my version because the sun in all the other shots is in the opposite direction. Only the shots you see of the city has the sun facing the approaching falcon.
Although, there is only one other shot with the sun in it and it's behind and to the left, as it is in the matte I put up. The other shots are only cloud shots, and the lighting seems to be inconsistent from shot to shot.