Evidence of discretization in conscious perception.
The Cydonis Face on Mars, imaged at high resolution by the HiRISE camera on the Mars Reconnaissance Orbiter in 2007 (NASA, Public domain image).
Pareidolia (erroneous pattern recognition) can be more likely at low resolution (see above) or at higher resolution (think about seeing images in wood grain patterns and other high-resolution textures).
Crevier and Meister demonstrated bifurcation and period doubling in retinal responses to flickering light in salamander retinas, producing curves that superificially look just like the logistic map. (1998)
Aliasing, mentioned earlier, is often apparent in video with spinning wheels or rotors. But the so-called "wagon-wheel effect" can also be perceived directly under continuous illumination ().
