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RTXGI: Scalable Ray Traced Global Illumination in Real Time (Presented by NVIDIA)

Adam Marrs (Senior Graphics Engineer, NVIDIA)

Location: Room 153, South Hall

Date: Wednesday, March 18

Time: 2:00pm - 3:00pm

Pass Type: All Access Pass, Core+Summits Pass, Core Pass, Summits Pass, Expo Plus Pass, Audio Pass, Independent Games Summit Pass, VRDC Add On - Get your pass now!

Topic: Programming

Format: Sponsored Session

Vault Recording: TBD

Audience Level: All

In this talk, we will discuss how you can achieve multi-bounce ray traced diffuse global illumination in real time with the new RTX Global Illumination (RTXGI) SDK. RTXGI fits into the modern game engine by directly replacing existing indirect lighting approaches such as screen-space ray casting, precomputed lightmaps, and baked irradiance probes. We combine ray tracing, fast irradiance updates, and a moment-based depth scheme for occlusion calculations to create a scalable system without bake times or light leaks. RTXGI is supported on any DXR-enabled GPU and provides developers with an ideal starting point to bring the benefits of real-time ray tracing to their existing tools, knowledge, and capabilities.

Takeaway

RTXGI is a practical way to add ray traced indirect lighting to games

Intended Audience

Graphics programmers