Kubrick credited the ease with which he filmed scenes to his early years as a photographer. He rarely added camera instructions in the script, preferring to handle that after a scene is created, as the visual part of film-making came easiest to him. Even in deciding which props and settings would be used, Kubrick paid meticulous attention to detail and tried to collect as much background material as possible, functioning rather like what he described as "a detective". Cinematographer John Alcott, who worked closely with Kubrick on four of his films, and won an Oscar for Best Cinematography on "Barry Lyndon", remarked that Kubrick "questions everything", and was involved in the technical aspects of film-making including camera placement, scene composition, choice of lens, and even operating the camera which would usually be left to the cinematographer. Alcott considered Kubrick to be the "nearest thing to genius I've ever worked with, with all the problems of a genius".