On Beneath the Planet of the Apes, makeup designer John Chambers had the task of creating the makeup of the radiation-scarred mutant humans: "This was a full, soft foam-rubber head appliance, and I used silicone adhesives to blend it out. In the ape appliances, there were small pieces, a chin, a muzzle, and a forehead, and the rest was face hair and a wig. It took more time to blend the edges there, but the mutants were already made up, and the only extra makeup we used was around the eyes and mouth. So we took two hours, average, on those."