Super Mario 64/Sombrero Build

Perhaps one of the most earliest builds of Super Mario 64 known is the affectionately named Sombrero Build, named after the character who wears a large sombrero. This build was likely a testing build for the Ultra 64 hardware, and many of the models associated with the build can be found in Nintendo 64 creation kits such as the infamous Sombrero Man.

Features
From the screenshot of the build, it can be seen that the build features much different landscaping to Super Mario 64: the ground is brown and uneven with many hills, there are three trees positioned around the 'island' and the background is a simple picture of a cloudy sky. Mario has been replaced with the stock low-poly sombrero-wearing person with a red and white checkered shirt and there are three Bob-ombs scattered around the 'island'.

Theorising
There is no date associated with this build, but judging by how barebones it is and how it hardly resembles the final game, it is likely a very early version of the game. It is unknown if this game predates the 1995/07/29 build, or actually is this build. Reports of the infamous build says that the game hardly resembles the Mario universe, which would line up with the Sombrero Build. However, the Sombrero build seems to lack the castle.

Many source the Sombrero build as the first iteration of Bob-omb Village, a supposedly removed level from Super Mario 64. This is evident by the Bob-ombs that appeared to be present within this build. No semblance of a village can be seen within the screenshot however.