Kink in the optics? The explanation, that our brain is extremely vulnerable to recognize patterns. Here superimpose two, the chessboard with its high symmetry in the horizontal + Vertical and the crosses, in which the color symmetry can only in one plane left, while but otherwise coincide with the symmetry of the chessboard. That is purely intuitive view, that crosses as such and the chessboard in principle have the same symmetry, therefore they belong together and are not perceived as something separate. Since the color of the crosses but apart from this symmetry, studied our brains for this pattern a statement and finds this in a „new quality“ namely the 3-dimensionality…

Hirnverdreher of the day