Kubrick began to explore the art of filmmaking in the 1950s. His first films were documentary shorts financed by friends and relatives. His first feature, the 1953 military drama Fear and Desire, was made independently of a studio—an uncommon practice for the time. Early into his filmmaking career, Kubrick acted as cinematographer, editor and soundman, in addition to directing. Later, he would also write and produce. Kubrick made 10 feature films from 1957 to 1998, with early releases including the acclaimed films Spartacus (1960); Lolita (1962), based on the novel by Vladimir Nabokov; and Dr. Strangelove or: How I Learned to Stop Worrying and Love the Bomb (1964). Denied official cooperation from the U.S. armed services during the filming of Dr. Strangelove, Kubrick went on to construct sets from photographs and other public sources.