How Disney's Sodium Vapor Prism Process Improved Compositing

Corridor Crew · Explainer · 12 min · 2024 · YouTube title: This Invention Made Disney MILLIONS, but Then They LOST It!

Why it's here

Recommended as a fun, informative rediscovery of a lost film-effects technique.

What it covers

Corridor Crew tracks down Disney's lost sodium vapor prism process, used for Mary Poppins-era transparency mattes. They explain how a narrow sodium wavelength and a beam splitter enabled better compositing than green screen.