Inside Mesa 26.0's RADV RT improvements
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pixelcluster
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Inside Mesa 26.0's RADV RT improvements is a January 2026 technical blog post by pixelcluster on Mesa RADV Vulkan ray-tracing work for AMD GPUs.
It focuses on RT pipeline compilation and dispatch: adding proper shader function calls and calling conventions in ACO so any-hit and intersection shaders can compile separately instead of being inlined into one megashader. It covers Unreal Engine library linking pain, Ghostwire Tokyo RT speedups, parallel compile benefits, and a Lumen dispatch fix for 2D ray workgroups.
It is for advanced Mesa, Vulkan RT, and GPU compiler engineers who already understand ray-tracing pipelines and AMD shader compilation.
The post is a free long-form HTML article with diagrams and merge-request context on pixelcluster's GPU blog.
It is useful as a driver-side account of why separate any-hit compilation matters for compile stutter and traversal performance.
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