volt-gui has been released in version 2.2.2.

The tool is a Vulkan implicit layer with a graphical interface that lets users adjust Vulkan behavior for games on Linux in a driver-agnostic way, covering things like texture filtering, the frame limiter, and display settings.

One day after version 2.2.1, 2.2.2 lands as a small fix for Flatpak compatibility. The launcher now mounts ~/.config/volt-gui into the sandbox itself, so Flatpak games pick up the selected profile regardless of the home permissions in the app manifest - previously settings were silently ignored on some Flatpaks. The layer also now logs the path and reason when a profile cannot be read.

Small Fix:

2.2.2 is a small fix over the 2.2.1 release, changing:

• Flatpak games get your profile regardless of the game/app now. Found this playing around with the PCSX2 flatpak, the layer loaded fine but the sandbox does not mount ~/.config/volt-gui, so the layer found no profile and every setting silently passed through. Whether that happened depended entirely on the game, an app whose manifest already grants broad home access saw your profiles and one that does not saw nothing, which is why this worked on some flatpaks and not others. The launcher now mounts that directory itself, read-only, or read-write under --probe, so it no longer depends on what the app happens to allow.
• If the profile cannot be read the layer now logs the path and why, instead of quietly falling back to defaults.

Source: GitHub