Yeah, the animation itself just about has to be procedurally generated. The patterns I see when I let my eyes relax makes it look like some sort of tiling scheme, or maybe a few of them with some sort of gently fuzzed transform between them.
It seems familiar, but I can’t recall the source. I want to say that it reminds me of a paper/article about cellular automata, but with the twist that they used real numbers instead of integers (whatever that means). But I’m not at all certain that I trust that memory.
The closest thing I could find with a brief search was “continuous-valued cellular automata”, but this is not a great match:
On the plus side, I just discovered that Rudy Rucker has a github account. I don’t know why that surprised me, but I think it’s kinda’ neat.