chroma-key
noun
chro·ma-key
ˈkrō-mə-ˌkē 
: a photographic compositing technique based on the separation of colors in the original images
especially
: blue screen sense 1
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“Chroma-key.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/chroma-key. Accessed 20 Dec. 2024.
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