During an interview by Nintendo Power magazine, Miyamoto stated that he had the idea for a Mario 3D game during Star Fox's development. This led to a rumor that there was a prototype for a 3D Mario Game called Super Mario FX for the SNES, using the Super FX chip. Dylan Cuthbert, who was a contributor to the development of the FX chip and helped Miyamoto with developing Star Fox, stated that "Super Mario FX" was actually the codename for the FX chip itself.