Mario's crouching animation was closer to a squat.This model can be found in the iQue gigaleak. Mario's head model was lower poly than the one present in the final game.
This is a much later version of the Super Mario 64/July 29th 1995 build. The Spaceworld '95 (also known as the Shoshinkai Beta) is a build of Super Mario 64 shown in Spaceworld '95, where Super Mario 64, as well as Kirby Bowl demos were shown for the Nintendo 64 (which at the time, was called the Ultra 64). Super Mario 64 Beta Footage (SpaceWorld 95')