Another quick suggestion:

I've noticed that there are quite a few shots where you can see clouds in the sky, yet in most if not all of these side shots of the snowspeeders there are no clouds in the sky.

Is there any possibility to add a sky background element to these shots?

And kudos to Jaitea. Great mock-up on the AT-AT foot! Is there any way to make it bigger, or is it one of those things where it becomes to big to manipulate? Also, would it be possible to have the foot sink a bit deeper into the snowspeeder (to indicate the weight of the AT-AT coming down on the ss)?