[throwaway128128]

Knowing the quality of Saturn 3D games I can't imagine the 3D GPS feature was any good..

[Grazester]

The Saturn had good 3D games! The work it took to get a decent 3D games not many game studio could do. In fact it might have been only Sega. And for something as simple as a 90's 3D map the Saturn could certainly do with ease, once again if it wasn't half assed

[scheeseman486]

The most impressive engine released retail on Saturn was Slavedriver, which was developed by Lobotomy for Powerslave and re-used for ports of Duke Nukem 3D and Quake.

If counting homebrew though, there's this demo which clearly developed by some kind of magician: https://www.youtube.com/watch?v=WpcjkDDLoXM

[sillywalk]

IIRC the Saturn used quadrangles.