RU.08 said:
I don't think they intended to add the bridge, I think it was a result of re-rendering the scene from the wrong computer file. These screenshots are from the bluray:
Laserdisc:
I don't think so. Jorge just didn't pay attention. He wanted to add the bridge but didn't realize it should be added to that other shot aswell. There are numerous horribly executed changes in the OT. For example in ROTJ during "Jedi Rocks" you can still see the original Sy Snootles puppet in the earlier scene. In ANH in the "dead end" scene they forgot to change the reflection of the ground that still showed the wall even though there was now this huge hall full of Stormtroopers.