"The Old Mill" was a 1937 short animated film by Walt Disney studios (Direct link to YouTube). The film shows the effect of a storm on various animals who inhabit an abandoned windmill.
During this period, Disney was trying to push the art form of animation to new levels of mood and realism. The studio was pioneering the multiplane camera, sweeping camera moves, more naturalistic animal behavior, and effects animation for the wind and rain, all of which were used in Disney's first feature, Snow White and the Seven Dwarfs.
An exhibition of the art of Snow White opens at the Norman Rockwell museum on Saturday. The show continues through October 27.
The Old Mill
Snow White and the Seven Dwarfs
Video: Walt Disney explains the multiplane camera