The bottom looks like a mathematical function to introduce noise into the equation. As in “take shape => make it less shape-shaped” (where shape was one of square, rectangle, circle, oval, etc… at least on the before side). Perhaps it works by scanning the periphery and introducing additional vertices at random spots in order to increase the resolution of the polygon!? Or, you know, maybe they just kicked the box a bunch of times really hard with their feet. :-P

IDK what that is but it looks like Stokes shift

Courier transform looks like it could be a legit function to introduce topological deformations in a nonhomogenous manner…