Image showing three Necker Cubes side by side, the first is highlighted to cause the cube to appear to be oriented to face towards the top left, the other is highlighted to appear to be oriented downwards towards the bottom right, the third has the centre square and the triangles around it highlighted to invite the viewer to interpret it as a flat image

Image showing three Necker Cubes side by side, the first is highlighted to cause the cube to appear to be oriented to face towards the top left, the other is highlighted to appear to be oriented downwards towards the bottom right, the third has the centre square and the triangles around it highlighted to invite the viewer to interpret it as a flat image

Necker cube and impossible cube - Louis Albert Necker - The Necker cube is an optical illusion first published as a rhomboid in 1832 by Swiss crystallographer Louis Albert Necker.

Necker cube and impossible cube - Louis Albert Necker - The Necker cube is an optical illusion first published as a rhomboid in 1832 by Swiss crystallographer Louis Albert Necker.

Necker cube in Pompeii, courtesy of S. Jaskulowski

Necker cube in Pompeii, courtesy of S. Jaskulowski

Necker cube - Wikipedia, the free encyclopedia. Wire frame cube.

Necker cube - Wikipedia, the free encyclopedia. Wire frame cube.

Necker Cube Illusion - Ambiguous Images: Accidental Viewpoint

Necker Cube Illusion - Ambiguous Images: Accidental Viewpoint

Image result for necker cube

Image result for necker cube

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