Photo-montage

Artist's impression of the role of a quantum observer: depending on where the observer is positioned, and what part of the figure is seen, the water will be seen to flow differently.

In this image we can see inspiration of two artists. Firstly, it's M.C. Escher with his Waterfall but in simpler form. Secondly, it's Sandro del Prete with his impossible chessboard.

The image was found at https://phys.org/news/2017-10-reversal-current-quantum.html