CryZENx, best known for his amazing Zelda Ocarina of Time remakes in Unreal Engine 4, has released some new screenshots from his upcoming Super Mario 64 tech demo in Unreal Engine 4. These images are still WIP, so the final tech demo will look better than what is being shown here.
Source: N4G PC New screenshots released for Super Mario 64 fan tech demo in Unreal Engine 4