The effect is best described as some mysterious sphere or orb of dark matter or negative energy that moves through the fractal space. When I was rendering some shots for this film, it became clear to me that the orb itself was a mirrored and warped version of the world around it, which I thought was very cool. After doing some research, I found that this effect is called Sphere Inversion, or Inversion in a Sphere, and is a subset of Inversive Geometry.