This optical illusion is very well done. Can you guess the exact nature of this construction.

At first impression most people dimples.In the absence of an obvious light source most people place an imaginary light source above the image (being earthlings living under the sun i suppose this is only natural). Because of this pre-conception we now imagine a shadow being cast at the top of the circles and light being caught on the bottom that is our assumption of where the light is coming from forces us to see indentations.

In nature, we see the butterfly that has large black dots that look like eyes. And Caterpillars and other insects that appear as if their eyes are big and black, but in fact, they are just a distractionary technique to fool hungry predators. This man has taken it to a new extreme... In order for people to stop talking to him he has tatooed a face on the back of his head! I don't think this is just marker ladies and gentelmen!

The nature did some of the best illusions and hot lava is no exception.