 A huge jungle stage set was built, with Robert Armstrong and Fay Wray as the stars.Once the film was underway, Cooper turned his attention to the studio's big-budget-out-of-control fantasy, "Creation", a project with stop motion animator Willis O'Brien about a group of travelers shipwrecked on an island of dinosaurs.When Cooper screened O'Brien's stop-motion "Creation" footage, he was unimpressed, but realized he could economically make his gorilla picture by scrapping the Komodo dragons and costly location shoots for O'Brien's animated dinosaurs and the studio's existing jungle set.