Sonic 3D Blast Prototype Menu

The Sonic 3D Blast Prototype 825 and the Sega Saturn Tech Demo features an odd-looking version of Sonic in the main menu. According to Jon Burton, the founder of Traveler's Tales, this was actually a proper render of Sonic but the angle made his eyes very prominent.¹  In the final build it was fixed.

Prototype:

Final build:

^{1 source: https://tcrf.net/Proto:Sonic_3D_Blast_(Genesis)/825_Prototype}