Valve are continuing to polish the next version of Steam Play's Proton with an update to the beta channel.
Proton 3.16-2 was released in the last day which includes these changes:
- DXVK is again built as a Windows DLL, due to incompatibilities with the Steam runtime. This should fix widespread crashes with Direct3D 11 titles.
- DXVK updated to 0.90.
- Fix for alt-tab crashing on Unreal Engine 1 games, including Deus Ex.
- PROTON_USE_WINED3D11 is now called PROTON_USE_WINED3D to reflect that this variable affects more than Direct3D 11. The old name still works as an alias.
They've also moved the changelog, which can now be found here. The updated version of DXVK will fix issues with Bioshock, Dark Souls 3, The Evil Within and gives a small CPU improvement for Assassin's Creed Odyssey.
To enable the beta, you need to go into Steam's main settings, locate the Steam Play section in the left panel and choose it from the dropdown box. You do not need the Steam beta client.