Bringing up the earlier topic of the sudden blast marks on the AT-AT's side:

Rewatching Adywan's magnificent work on this clip, I noticed that there are actually FOUR blast marks that appear that do not correspond to any snowspeeder laser blasts:

It was kinda difficult to make out the first and third strikes to appear. Maybe further study should be made as to what to do here. The easiest thing would probably be to erase the scorch marks and (maybe) make new ones that correspond to where Luke blasts it.