It was first experimented with in 1949, shortly after the invention of Scotchlite, and had appeared in feature films by 1963, when the Japanese film "Matango" used it extensively for its yacht scenes. Another early appearance was in 1966, during the filming of "". The actors in ape suits were filmed on a stage at Elstree Studios and combined with footage of Africa (the effect is revealed in the leopard's glowing eyes reflecting back the light). Dennis Muren used a very similar solution for his 1967 debut film "Equinox", although Muren's technique didn't employ Scotchlite. Two British films released in 1969, "On Her Majesty's Secret Service" and "The Assassination Bureau", used the technique, as did the 1968 film "Where Eagles Dare".