As the visitor enters the inner cube, sensors are released and the space starts to warp. The edges of the room misalign, the side walls bend, the hight of the room shrinks and the whole space seems to modify its shape according to the movements of the person in the space. The walls and the ceiling start to move in a threating manner towards the viewer. By that time the viewer will become aware of the meaning of horizontals and verticals in spacial perception.

by Harald Freudenthaler, Museum of Perception Upper Austria 2004

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