[PREVIEW] Raytracing: Clustered Geometry, Partitioned TLAS, Indirect Acceleration Structure Builds

Today we’re introducing a preview of DirectX Raytracing (DXR) Clustered Geometry and Partitioned Top-Level Acceleration Structures (PTLAS), with a unified GPU-driven API for building and updating them. This is part of a larger AgilitySDK release described in the parent post: https://devblogs.microsoft.com/directx/agil…