We used to have a thread like this, but I think it ended up getting buried or neglected for various reasons. What with the rise of channels like EC Henry that are dedicated to exploring the art department details of the OT, I think we could use a thread to share subtle but interesting details in the set dressing or post-production process that can go unnoticed with how dense the production design of these films is. From a recent screening of the D+77 restoration, I noticed quite a few:

The Sandcrawler has an extra Threepio shell with the back of its head busted out and wires peeking through.
Luke’s landspeeder is actually parked behind the Lars Homestead dome during the droid auction.
Princess Leia’s cell appears to have a cell number! I’ll need to go to a high-res source to confirm for sure, but I do wonder if the plate is a heavily stylized “2187” in the same way as the large ‘94’ outside the Falcon’s docking bay.
The sound design in the trash compactor scene is interesting. The version I watched was definitely synched to the 6-track recreation and I know several things were beefed up for the original mono mix, but I did notice something; Luke mouths “Han?” a few times with no sound during the buildup to him getting dragged under. I can only imagine they found this a bit too cowardly on his part and muted the sound.
More than ever I could tell that Luke telling Wedge “You can’t do any more good back there” was from AFTER Biggs’ death originally; he’s been dubbed over to sound less distraught, but you can see Mark Hamill really did act out a reaction to Biggs’ death originally. I’d love to see that footage at some point.

What about you all?