https://wccftech.com/cyberpunk-2077-rtx-e3demo/

Cyberpunk 2077 RTX Ray Tracing will allegedly be used for diffused illumination and ambient occlusion.

Following the game’s new 2019 E3 trailer, NVIDIA and CD Projekt Red officially confirmed that the action-RPG will support RTX Ray Tracing. Further details weren’t announced, but based on an E3 Demo impression from PCGamesN, Cyberpunk 2077 uses NVIDIA’s Ray Tracing tech for ray traced ambient occlusion and diffused illumination.