Prewar animators faced several difficulties. First, they had to compete with foreign producers such as Disney, which were influential on both audiences and producers. Foreign films had already made a profit abroad, and could be undersold in the Japanese market, priced lower than what domestic producers needed to break even. Japanese animators thus had to work cheaply, in small companies with only a handful of employees, which then made it difficult to compete in terms of quality with foreign product that was in color, with sound, and promoted by much bigger companies. Until the mid-1930s, Japanese animation generally used cutout animation instead of cel animation because the celluloid was too expensive. This resulted in animation that could seem derivative, flat (since motion forward and backward was difficult) and without detail. But just as postwar Japanese animators were able to turn limited animation into a plus, so masters such as Yasuji Murata and Noburō Ōfuji were able to perform wonders that they made with cutout animation.