In my experience, that’s pretty much what 5-HT2A agonists (hallucinogens) do but to a stronger extent: You see peripherally a curled leaf on the ground, and perceive it as a snake before you take a closer look, or you see patterns on a marbled tile, and the exact positions of the shapes slowly wobble.
My understanding is that this is because you assign a lower confidence to your visual inputs than usual, and a higher confidence to your priors / the part of your brain that in-paints visual details for you.
In my experience, that’s pretty much what 5-HT2A agonists (hallucinogens) do but to a stronger extent: You see peripherally a curled leaf on the ground, and perceive it as a snake before you take a closer look, or you see patterns on a marbled tile, and the exact positions of the shapes slowly wobble.
My understanding is that this is because you assign a lower confidence to your visual inputs than usual, and a higher confidence to your priors / the part of your brain that in-paints visual details for you.