Not mentioned is the importance of light passing through the material. It's more than just light filling in the face. Would this illusion still work with black opaque plastic?
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This illusion is used in Disney's Haunted Mansion in Anaheim, it appears opaque with lighting cast upon it.
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Oh, bad Stephen Fry. He's messing with you! There's a flip from back to front @ 43 seconds. If you don't believe me, check the shadows at 47 seconds.
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