Developed by Petro Vlahos and heavily utilized by Disney, this method used a prism camera to capture actors against a yellow screen lit by sodium lamps. It allowed for incredibly clean mattes, avoiding the fuzzy "fringing" common in traditional bluescreen techniques of the era.

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: Archives containing production stills, art, storyboards, and advertising materials like posters and lobby cards from 1961. Alternative Viewing

But what makes this version different from the Blu-ray or the streaming cut? Here is everything you need to know.

: A "making-of" featurette about the production.

To give the illusion of physical contact, actress Susan Henning served as Mills’ body double, shot from behind or over the shoulder to maintain the visual illusion of identical twins. Why the "New" Internet Archive Upload Matters

The Archive hosts various newsreels that theaters would play before the main feature.

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Thus, the Internet Archive functions as a , one that disrupts traditional gatekeeping by studios and academic libraries.