![]() The foreground video is placed against a chroma-colored background (usually green, blue, or magenta) and then the background is digitally replaced with an alternate background. ![]() What is Chroma Key?Ĭhroma key is a special effects technique used in video production to superimpose a foreground image onto a background image, often to create a special effect. Green screens are an essential tool for filmmakers and video producers, and can be used to create a wide range of creative and visually stunning effects.
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