Proton Experimental Updated, VKD3D-Proton Moving Closer With Ray-Tracing

Written by Michael Larabel in Valve on 11 March 2021 at 02:22 PM EST. 13 Comments
Valve continues to be making exciting progress in the realm of Steam Play for improving the experience of running Windows games on Linux.

First up is a new Proton Experimental build now available. This latest Proton Experimental build has more work on reducing CPU overhead and helping performance, memory allocator performance work, support for Futex2 patches in FSYNC when using the latest kernel patches, better non-US keyboard support, improved video support, and a variety of other enhancements. For those with a VR headset, the virtual reality start-up time should be better and with increased compatibility for titles like Microsoft Flight Simulator.

Meanwhile over in VKD3D-Proton space is more work towards supporting DirectX 12 DXR (Ray-Tracing) atop Vulkan ray-tracing extensions.

For a while now VKD3D-Proton has been working towards DXR support and they are getting quite close. There is a pull request pending for RT tier 1.0 support

Thanks to Valve, the Linux gaming experience continues advancing quite nicely at least as far as Steam Play / Proton is concerned.
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Michael Larabel is the principal author of and founded the site in 2004 with a focus on enriching the Linux hardware experience. Michael has written more than 20,000 articles covering the state of Linux hardware support, Linux performance, graphics drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and automated benchmarking software. He can be followed via Twitter, LinkedIn, or contacted via

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