Here’s some production backgrounds from Snow White and the Seven Dwarfs. These were painted by Maurice Noble, who started his career in animation with Disney. He was fired by the company after participating in the animators strike and went on to spend the majority of his career working as a production artist and director for Warner Bros. and MGM.
Besides his career with Disney some of the most notable films he worked on as an artist were Duck Amuck, What’s Opera Doc?, and How the Grinch Stole Christmas. He co-directed the Oscar winning animated short The Dot and the Line: A Romance in Lower Mathematics with Chuck Jones.