Movement Illusion with a Twist

2018 Second prize
David Phillips, Priscilla Heard and Christopher Tyler: “Movement Illusion with a Twist”. UK

Given a ribbon of texture flowing obliquely, the addition of an upwardly moving background induces the vivid illusion that the whole ribbon is drifting sideways. A complex illusion of expanding skyward flow is obtained when the simple texture flow is changed to expansion. Opposing directions of contracting/expanding flow induce a remarkable illusion of continuous twisting motion of the doubled ribbon of texture flow, even without a moving background. These effects illustrate complex interactions between motion flow fields and the motion induced in their self-defined borders.

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