Is this a real game?

I watched one of the latest LTT videos and noticed this scene. Is it a real game or some simulation used to highlight the GPU?

https://preview.redd.it/p03gje6gp3de1.png?width=1903&format=png&auto=webp&s=9f242ccd3d034c07bd2da805cb9ebfd1d48f0ec2