How Does a Green Screen Work?
It does not have to be green. The technique can be done using any color, even colors which are outside of the spectrum of human vision (as long as you develop a camera that can pick it up). Green is used often because it's easiest for most modern cameras to pick up, giving the editor the cleanest possible image.
What is a Green screen.
Green screen refers to a technique used to make people look like they are somewhere they aren't. The primary subject is filmed against a plain background, which is normally either green or blue. The background is later replaced with the background of whichever place the subject needs to look like they have gone to.
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