After the war, and with the advent of television, audiences slowly drifted away. 20th Century-Fox held on to its theaters until a court-mandated “divorce”; they were spun off as Fox National Theaters in 1953. That year, with attendance at half the 1946 level, 20th Century-Fox gambled on an unproven gimmick. Noting that the two film sensations of 1952 had been Cinerama, which required three projectors to fill a giant curved screen, and “Natural Vision” 3D, which got its effects of depth by requiring the use of polarized glasses, Fox mortgaged its studio to buy rights to a French anamorphic projection system which gave a slight illusion of depth without glasses. President Spyros Skouras struck a deal with the inventor Henri Chrétien, leaving the other film studios empty-handed, and in 1953 introduced CinemaScope in the studio’s groundbreaking feature film The Robe.