For those of you with a graphics card capable of Ray Tracing who use the Steam Play Proton compatibility layer we have some good news coming for you. While it's still clearly an early work in progress, work towards getting Ray Tracing working in VKD3D-Proton is well underway (VKD3D-Proton is the Direct3D 12 API on top of Vulkan that's used with Proton).
Developer Hans-Kristian posted on Twitter about "Ray-tracing support in vkd3d-proton is finally starting to come together. Starting with some meme reflections." and shared two pictures showing the reflections working in Control but the performance drop is huge but it will hopefully be improved over time.
For those interested, Control is available in the current Humble Choice.
To go along with that, there's also the Draft proposal up on the official VKD3D-Proton GitHub titled "Enable RT tier 1.0" for those who do wish to jump in at the deep end and follow it along.
On top of that another update to Proton Experimental went out with an additional controller fix for Slay the Spire. That's on top of all the additional extras in this special Proton build where all the latest stuff goes in like support for the futex2 patches, Wine architectural work to reduce CPU overhead, improved video support and so on.