volt-gui has been released in version 2.2.0.

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.

Following version 2.1.1, 2.2.0 mostly reworks the volt-probe component: X11 and Wayland are now loaded at runtime instead of linked, so neither is a build dependency anymore. The probe.toml file stores present modes, image counts, and alpha modes per backend, and a new Display Backend Preference option lets users pick between the Qt default, xcb, or Wayland. Window transparency now only applies under xcb, since Wayland has no window opacity protocol.

2.2.0

• volt-probe now opens X11 and Wayland, both loaded at runtime instead of linked, so neither is a build dependency and a machine missing one reports the other.
• probe.toml now carries one section per backend that opened, so present modes, image counts and alpha modes are read per backend. Those three cards now offer the union with every value naming the backends that reported it, mailbox (xcb, wayland), and profiles still store the value alone.
• New Display Backend Preference option. Default lets Qt pick, xcb and wayland set the plugin with the other as fallback.
• Window Transparency now only applies under xcb, since Wayland has no window opacity protocol.
• probe.toml is now written atomically and only when it changed.
• Sources moved under src/.

Source: GitHub