VKD3D-Proton 2.3 Released With Early DXR Support, Performance Improvements

Written by Michael Larabel in Valve on 22 April 2021 at 11:45 AM EDT. 9 Comments
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VKD3D-Proton 2.3 is now available as the latest release of this Steam Play (Proton) component for running Direct3D 12 games over Vulkan.

Most significant with VKD3D-Proton is early, work-in-progress support for Direct3D 12's DirectX Ray-Tracing (DXR) implemented atop Vulkan ray-tracing. For those with a GPU/driver supporting Vulkan ray-tracing, VKD3D-Proton is beginning to work with "real content" albeit still work-in-progress and a limited number of games working. The Radeon Software Linux driver released this week with Vulkan ray-tracing also isn't working so for the moment is just the NVIDIA proprietary driver.

Games tested with VKD3D-Proton's DirectX Ray-Tracing are Control and Ghostrunner.

VKD3D-Proton 2.3 also brings conservative rasterization tier-3 support, variable rate shading tier-2 support, and various game fixes. There is also better performance in GPU-bound situations by up to 20% on NVIDIA for RE2, support for async compute queues, and various other performance optimizations and fixes.

More details on VKD3D-Proton 2.3 via GitHub.
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