Video Production! Knightmare Documentary!
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It's because in light there are three main colours:
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RED
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GREEN
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BLUE
Blue and Green screens are commonly used among filmers because of their Chroma Keying abilitites, as the body has no means of blue or green colour... Red screens can also be used but bear in mind that the colour of you skin will go too...
Get the picture?
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- how do you put the graphics onto the blue screen?
You don't quite do that. You run the video footage through a computer and it removes all the blue light esp. the blue screen itself. You can then program the computer to replace the light with any image you like.
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