Super Mario FX is a game speculated to exist for the SNES that utilized a more advanced version of the Super FX Chip. Although Shigeru Miyamoto has said that he thought about experimenting with a 3D Mario game using the Super FX chip, no evidence of such a game has ever surfaced. To complicate the issue further, it seems the name "Super Mario FX" arose from a misunderstanding about the Super FX chip itself. During its development, the Super FX chip was codenamed 'Super Mario FX', and the original line of chips have the word 'MARIO' printed on them.