Two overlapping grids of reflective tubes produce the above Moiré pattern by Koert Feenstra.

A moiré pattern is an interference pattern created by overlaying two or more grids at an angle. The moiré pattern above is by Jacob Yerex.

"This image depicts the interaction of nine plane waves—expanding sets of ripples, like the waves you would see if you simultaneously dropped nine stones into a still pond. The pattern is called a quasicrystal because it has an ordered structure, but the structure never repeats exactly. The waves produced by dropping four or more stones into a pond always form a quasicrystal."