 Ridley Scott (qv) cites three films as the shaping influences on  his movie: _Star Wars (1977)_ (qv) and  _2001: A Space Odyssey (1968)_ (qv) for their depiction of outer  space, and Tobe Hooper (qv)s  _Texas Chain Saw Massacre, The (1974)_ (qv) (1974) for its treatment  of horror.