A simulation of a noisy retinal sheet (fovea in center, blind spot off-center to left) changing with near-critical dynamics.
This is fed to a "visual rule" perception engine, generating a 3D model, which is then rendered in 2D.
Fields of aligned activity are “inflated”, echoing D. Hoffman's description of shape rules.
This creates an effective first-order simulation, for the viewer, of the phenomenal experience of closed-eye illusions.