A quote from director Andrew Stanton:
Life is nothing but imperfection and the computer likes perfection, so we spent probably 90% of our time putting in all of the imperfections, whether it's in the design of something or just the unconscious stuff. How the camera lens works in [a real] housing is never perfect, and we tried to put those imperfections [into the virtual camera] so that everything looks like you're in familiar [live-action] territory.
(Hat tip: Kottke)
This article available online at:
http://www.theatlantic.com/daily-dish/archive/2008/07/wall-e-and-the-technology-of-imperfection/214524/
