This is a 'Tunnel book' from 1830 giving you a sense of depth.

@Amazing_Facts

This is exactly the idea behind the multiplane camera, which #disney commercialized in the 1930s for #SnowWhite . Different depths of the image are on different levels, giving the animated motion picture a more lifelike feel.

One of the original multiplane cameras is on display at the Walt Disney Family Museum in San Francisco

https://en.wikipedia.org/wiki/Multiplane_camera

Multiplane camera - Wikipedia

@donaldham @Amazing_Facts
I was at the Disney Family Museum on Saturday just marveling at the multiplane camera.