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"Almost from the very beginning of cinema's history, filmmakers have been trying to push the boundaries of the medium. While recent thinking often resists the presumption that images should be a certain height and width, housed with the square or rectangular containers they’ve become contained to, much early experimentation fought in the other direction: against the flatness of the frame, and towards depth - towards 3D. Why should the world’s three dimensions, through capture, be reduced to just two?"
Full article on the history of 3D cinema on Little White Lies