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Motion Blur

Motion blur plays into many of the more advanced illusions you can create with After Effects, but it is fundamentally quite simple. If a layer animates at a sufficiently high velocity, and the Motion Blur toggle is enabled, for it and for the composition containing it, then for free you get this great illusion that the elements blur to match the apparent motion of the scene.

Motion blur is an artifact of motion occurring while a camera shutter is open. It is not something that you encounter with your naked eye, yet it looks very natural when you see it on film or video. It is a complement to your eye's persistence of vision that helps your eye to accept the low frame rate of film (or video). It also looks quite pretty even in still photos, which is part of the reason that efforts to eliminate motion blur from a sampled image have tended to fall flat.


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