CryZENx, best known for his amazing Zelda Ocarina of Time remakes in Unreal Engine 4, is currently working on a Super Mario 64 tech demo in Unreal Engine 4. Although we dont know what this demo will offer, CryZENx released a comparison screenshot between this Unreal Engine 4 PC fan project and its original Nintendo 64 version.
Source: N4G PC Super Mario 64 – Nintendo 64 versus Unreal Engine 4 PC fan project screenshot comparison