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Entertainment → Movies → Movies: L - Z → The Wizard of Oz
ANSWERS: 2
  • TheHappyHippies
    Magic Silly!
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  • Merfish
    The Witch's crystal ball was a front projection screen. Front Projection (often abbreviated FP) is a technique which can achieve the same result as green screen, but "in camera," that is to say, the composition of subject and background is complete as the combined image is acquired by the camera. http://en.wikibooks.org/wiki/Movie_Making_Manual-Visual_Effects#Front_Projection
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