This is another one of those impossible shape illusions. As usual, it can appear as a hexagon or cube. 6 color impossible Impossible Hexagon Cube
An example of a necker cube and an Impossible cube (one arm runs across the other but is still straight, which can't happen in 3D; it's an optical illusion) cube geometry impossible Necker cube and impossible cube
An example of a necker cube and an Impossible cube (one arm runs across the other but is still straight, which can't happen in 3D; it's an optical illusion). geometry outline wireframe Necker cube and impossible cube
This is another one of those impossible shape illusions. As usual, it can appear as a hexagon or cube color cube hexagon Impossible hexagon cube