Various artists

In this draft of a banknote by illustrator from United States Emmanuel Tavares inspired by Escher's artworks we see two objects, which formed the basis for his artwork "Waterfall". The Penrose tribar to the left is the figure, which the construction of watermill derived from. The polyhedron to the right crowned the right column of the watermill.

Artist's deviantART profile http://jellogiant.deviantart.com

The image source http://jellogiant.deviantart.com/art/escher-bill-34392931