Page "Super Mario 64" Paragraph 9

The development of Super Mario 64 took less than two years, but it was reported that producer and director Shigeru Miyamoto had conceived of a 3D Mario game concept over five years before, while working on Star Fox.

Miyamoto developed most of the concepts during the era of the Super Nintendo Entertainment System ( SNES ) and considered using the Super FX chip to make it an SNES game, but decided to develop it for the Nintendo 64 due to the former system's technical limitations.

IGN said that Miyamoto had conceived of his idea as a proposed game called Super Mario FX.

On his Twitter Dylan Cuthbert stated that there was never a Super Mario FX game ever in development, and that " Super Mario FX " was the internal code name of the FX chip.