Microsoft has officially released DirectX Shader Model 6.9 as part of the Agility SDK 1.619 update, bringing powerful new capabilities to graphics developers. The update introduces Long Vector support, enabling HLSL vectors up to 1024 elements for element-wise operations. Microsoft also released the complementary DirectX Shader Compiler version 1.9.2602.16.

The update extends specialized HLSL functions like IsNan, IsInf, and the newly added IsNorma to fully support 16-bit floats. Previously optional hardware capabilities, including 16-bit and 64-bit shader operations, are now strictly required. The company also released Agility SDK 1.719-preview with experimental features.

Key DirectX ray tracing (DXR) 1.2 features exit preview, including Opacity Micromaps and Shader Execution Reordering. OMMs, first announced with NVIDIA's Ada Lovelace architecture in 2022, enable efficient handling of complex alpha-tested geometry. SER allows applications to dynamically sort rays for optimized parallel execution. Microsoft has addressed developer feedback with quality-of-life improvements like Revised Resource View Creation API and CPU Timeline Query Resolves that reduce GPU overhead.