Feed the Kitty (1952)

It's not worth cataloging it all, neither the details nor the referential jokes (though I have to go on record as saying that the re-enactment of a scene from the 1952 Chuck Jones short Feed the Kitty is as noble an homage to classical animation as Pixar has ever performed), because even a cursory viewing can't help but pick up at least some of the work that went into creating a deep, totally plausible environment for the film's action, using indescribable breadth of imagination to create the illusion of a quotidian world.