Realism

Another essential element of the motion-picture image is that it gives an impression of reality. Whether in a drama enacted expressly for the camera or in a documentary film of an event at which the camera just happened to be present, this feeling of realism deriving from motion-picture photography accounts for much of the force of motion pictures. Animated films, which lack this element of photographic realism, tend to be taken as fantasies.

The attempt of the motion picture to reproduce three-dimensional reality on a flat screen presents the same problems and opportunities that are encountered in still photography and in painting. The standard camera lens, in fact, is constructed to produce visual effects precisely similar to those achieved by painters using the principles of perspective that were developed during the Renaissance.