• PumaStoleMyBluff@lemmy.world
    link
    fedilink
    arrow-up
    13
    ·
    14 days ago

    My entirely amateur guess is that our peripheral vision interprets the black and white plus signs as highlights and shadows on a rolling surface.

    A bit like how we know there are 3D waves in this image because of the highlights and shadows, while knowing that the water is all the “same color”: