TMBTM said:
Just a thought about the moving mask thing: in ROTJ when the Ewoks fight inside the biped walker, the imperial soldier also have an obvious moving plastic helmett.

"???WTF??? I don't get what you are saying!"

Lol, sorry, I'm french, sometimes it's hard to make myself clear. I just wanted to say that, in ROTJ, the imperial soldier who is attacked by 2 Ewoks inside the biped walker (don't know how you call it in english) also have a helmet (and not "helmett", sorry again) that really looks like cheap plastic.