How does a 3D film improve the viewer's ability to perceive depth?

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Explanation

3D movies create the illusion of depth primarily by simulating retinal disparity, which is the slight difference in images seen by each eye. This difference allows the brain to interpret depth, enhancing the three-dimensional experience. Other depth cues like linear perspective, convergence, and interposition contribute to depth perception but are not the main mechanisms used in 3D films.