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Filmnoir was also derived from the crime/gangster and detective/mystery sagas from the 1930s (i.e., Little Caesar (1930), Public Enemy (1931) and Scarface (1932)), but very different in tone and characterization.
Filmnoirfilms (mostly shot in gloomy grays, fls and whites) thematically showed the dark and inhumane side of human nature with cynicism and doomed love, and they emphasized the brutal, unhealthy, seamy, shadowy, dark and sadistic sides of the human experience.
Filmnoirfilms were marked visually by expressionistic lighting, deep-focus or depth of field camera work, disorienting visual schemes, jarring editing or juxtaposition of elements, ominous shadows, skewed camera angles (usually vertical or diagonal rather than horizontal), circling cigarette smoke, existential sensibilities, and unbalanced or moody compositions.
Filmpreservation of decaying film stock is a matter of concern to both film historians and archivists, and to companies interested in preserving their existing products in order to make them available to future generations (and thereby increase revenue).