It seems it may also leverage the "perpetual diamond" illusion that made the rounds last year, which mostly has to do with gradients on edges: https://journals.

It seems it may also leverage the "perpetual diamond" illusion that made the rounds last year, which mostly has to do with gradients on edges: https://journals.sagepub.com/doi/full/10.1177/2041669518815708 https://journals.sagepub.com/doi/full/10.1177/20416695188157...