A lap dissolve (sometimes called a cross-fade, mix or simply a dissolve) is a technical term in film editing, most often used in the United States, applying to the process whereby the fading last shot of a preceding scene is superimposed over the emerging first shot (fade in) of the next scene, so that, for a few moments, both shots are seen simultaneously. Generally, but not always, the use of a dissolve is held to indicate that a period of time has passed between the two scenes.
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