For big screen projected analog sources (aka, a video signal rather than film) there was this amazing piece of tech: https://en.wikipedia.org/wiki/Eidophor http

For big screen projected analog sources (aka, a video signal rather than film) there was this amazing piece of tech: https://en.wikipedia.org/wiki/Eidophor https://en.wikipedia.org/wiki/Eidophor A mirror coated in a thin layer of oil that is deformed by electrostatic charges.