Yeah. I think rotational motion blur would tell the brain right where the center was and remove the ambiguity. (As would a more-faithful-to-reality animation that realistically portrayed motion blur.)

As for descriptions, like: "This is a single grid rotating but your vision will detect 5-6 independent rotations," I disagree that it is a single grid rotating, for it appears to me a crude animated movie partially simulating similar, one that happens to be actually loaded with ambiguity.

It can be illuminating how a brain resolves such ambiguity, and psychologists spend much time investigating similar effects, but asserting what the response's stimulus "really" is not informative.

I don't think this example is really an illusion, where the typical interpretation is contrary to the facts. This one is just vague.

But, I like vague.

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