The sodium vapor process (occasionally referred to as yellow screen) is a photochemical film technique for combining actors and background footage. It originated in the British film industry in the late 1950s and was used extensively by Walt Disney Productions in the 1960s and 1970s as an alternative to the more common blue screen process.
The sodium vapor process (occasionally referred to as yellow screen) is a photochemical film technique for combining actors and background footage. It originated in the British film industry in the late 1950s and was used extensively by Walt Disney Productions in the 1960s and 1970s as an alternative to the more common blue screen process.
Source: Wikipedia "Sodium vapor process" · CC BY-SA 4.0
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