This is also kind of interesting:
http://www.lycaeum.org/mv/i/chick_digs_it_2.htmlI made that by juxtaposing pages from these notoriously corny religious comic books by Jack Chick.
It's entirely possible that most "meaning" perceived by humans is projected, rather than being intrinsic to the presumably meaningful processes being observed.
There's an entire genre of psychological tests called "projective tests" that use ambiguous images or other stimuli to evoke responses from patients. The two most well-known of these are the now-discredited Rorschach Ink Blot Test and the Thematic Apperception Test. A parody of the Thematic Apperception Test is used in the film "A Clockwork Orange" when the therapist is showing the protagonist these faceless comic books panels and he says "No time for the old in-out, Luv, I've just come to read the meter."
John C. Lilly used repeating tape loops to evoke auditory hallucinations, a phenomena he refers to as "alternity". Lilly's concept of Alternity may be related to Robert Anton Wilson's notion of "reality tunnels'. People tend to see and hear what they expect to see and hear based on previous experience and their learned mental models.
Lilly also used headphones playing white noise to induce auditory hallucinations of voices during some of his LSD experiments. He refers to the technique in on of his books as "Hear the voice of God in the noise."
Various notes & items about this sort of thing:
http://mv.lycaeum.org/M2/n_halluc.html "stimuli that modulate auditory hallucinations"
http://mv.lycaeum.org/M2/cogitate.html "tape loops and auditory hallucinations"
http://mv.lycaeum.org/M2/noise_JCL.html "LSD and Neural Noise as a Matrix for Projection"
http://mv.lycaeum.org/M2/cage-zen.html "John Cage on Noise and Randomness"
-molokovelocet