This link might just be connected to the observation and interpretation of color. The irridescent wings of a butterfly is a result of natural processes at the nano scale.
Excerpt, chapter 5
But when a particle of gold is made very small, below 100 nanometers, 100 billionths of a meter, the particle begins to absorb shorter wavelengths of light, toward the blue end of the spectrum. The smaller the particle, the more blue is absorbed and the redder it appears.
But it gets even stranger, because not only size matters, shape does too.
Each of these vials contains water with silver nanoparticles dissolved in it. The only difference between them is the shape of the particles. In this test, silver rods give you yellow; silver triangles, green; silver prisms give you blue.
In physics, the definition of a noble metal is even more strict. It is required that the d-bands of the electronic structure are filled. Taking this into account, only copper, silver and gold are noble metals, as all d-like bands are filled and do not cross the Fermi level
So we can physically create the appearance and perception (illusion) of color from just three “noble” elements.
Hummm, I do see in the bottom row and the top row that the gas-tank looking figures have different characteristics and lined up in a certain order. In fact the vertical sides also have different shapes and order. The illusion of waviness is caused by the position of the 4 arms of the interior squares relative to each other. In combination, small details create the illusion of the waves. Cool.
Hate to use it as a chess board though…..
edit: WOW, just managed to see it straight. Squinted my eyes untill I could no longer see the little arms and the illusion was lost.