Looks like Leia’s Hoth hairstyle may have been different originally, with two long dangling plaits instead of a crown braid.
Never seen this concept art for Vader’s meditation sphere before.
Interesting to see that Luke’s jacket under his flight harness is detailed to be camera-ready.
Frank Oz with an early Yoda design that more resembles the Ralph McQuarrie/Joe Johnston sketches.
Yoda with legs! (The outfit was worn by Deep Roy.)
The “evil tree” became the “evil cave”.
Seems they tried using a puppet Luke head for the cave sequence and it looked obviously fake, so they went with having Mark Hamill stick his head in a diorama.
This droid is ALIVE!