Film noir peaked between 1940-1950 during World War 2, drawing on themes of uncertainty. It features urban settings like tall office buildings shot from low angles to seem imposing, and dark alleys where secrets are kept. Characters are typically shady and mysterious, like ambiguous anti-heroes who commit bad acts without remorse. Stylistic elements include low-key lighting that casts shadows, highlighting characters' hidden sides, and chiaroscuro effects contrasting light and dark to explore dual nature. Recurring themes revolve around corruption, crime, morality, mysteries and betrayals.