How is digital 3-D different from old 3-D Movies
http://entertainment.howstuffworks.com/digital-3d.htm
How is digital 3-D different from old 3-D movies?
Both old and new 3-D movies rely on quirks of human vision to create deep, panoramic scenes or objects that seem to fly from the screen. Human beings have binocular vision -- each eye sees a different image, and the brain combines them into a single, unified picture. The brain uses the slight difference in angle between the two images, known as parallax, to help it perceive depth.
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