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Two-Stroke Motion: "This new illusion won second place at the recent international 'Illusion of the Year' competition at the annual European Conference on Visual Perception, A Coruna, Spain.
What is it?
The illusion contains two pattern frames depicting a moving image (hence two-stroke) which are displayed using a technique that creates an impression of continuous forward movement. Any two frames from a motion sequence can be used. The two images below show two views of a motorcycle as it advances along the road."