The face-cube illusion by Jean Beuchet.

Abstract

The face-cube illusion was made by Jean Beuchet in 1966 (as indicated in the device) and this effect was not published. For this reason, it seems important to present this visual phenomenon. The effect is obtained from connected curved wire construction presented in three-dimensional space. The orientation of wires can be modified, and it can be perceived as either a cube or a face depending on one's viewing point.