“I found this video this week. It’s Walt Disney explaining how the multi-plane camera creates the illusion of depth to images, which sounds a bit geeky, but in fact isn’t. It’s a process they first used on Bambi in 1942.
What blew me away about this little film, was how smart Walt Disney was at hooking his audiences into his next feature length movie. Whilst it looks like he’s giving a behind the scene’s insight into how Disney films are made, what he’s really doing is showing the audience what an incredible cinema experience Bambi was going to be… or in other words, he’s selling tickets. Hell, it still works, because my first reaction on seeing this piece was to rent Bambi, so I could see the effect for myself.”
Read this article from Filmutopia.