Overview:

NVIDIA will show how to combine glossy reflection ray tracing with diffuse ray-traced irradiance field probes. This creates a complete dynamic global illumination solution that scales across all DXR GPUs and minimizes light leaking without requiring manual per-probe or lightmap work by artists. It fits into modern game engines by directly replacing screen-space ray tracing and baked irradiance probes. The key breakthroughs are a fast way of ray tracing and updating irradiance instead of denoising individual samples or convolving radiance probes, and a new moment-based depth scheme for preventing light and shadow from leaking through walls.