Editing Necker cube (section)

{{short description|Form of perceptual phenomena}}
{{multiple image
| width             = 125
| image1            = Necker cube.svg
| caption1          = The Necker cube: a wire frame cube with no depth cues
| image2            = Cube1.svg
| caption2          = One possible interpretation of the Necker cube
| image3            = Cube2.svg
| caption3          = Another possible interpretation
}}
The '''Necker cube''' is an [[optical illusion]] that was first published as a [[rhomboid]] in 1832 by Swiss [[Crystallography|crystallographer]] [[Louis Albert Necker]].{{sfn|Necker|1832}} It is a simple [[Wire-frame model|wire-frame]], two dimensional drawing of a cube with no [[visual cues]] as to its [[Map orientation|orientation]], so it can be interpreted to have either the lower-left or the upper-right square as its front side.