AlejoHausner writes "In 1972, Ed Catmull, then at the University of Utah, put together a film showcasing many of the 3D computer graphics techniques he and others had developed while working as students in Ivan Sutherland's lab. That film has been digitized and is available on http://nerdplusart.com/first-3d-rendered-film-from-1972-and-my-visit-to-pixar . All kinds of modern techniques like gouraud shading, deformed meshes, and z-buffering are shown in the film. There is a segment showing Catmull digitizing a plaster model of his hand. Catmull later founded Pixar, but at the time the Utah lab pioneered many of the graphics techniques we take for granted today." Link to Original Source
If it happens once, it's a bug. If it happens twice, it's a feature.
If it happens more than twice, it's a design philosophy.