For a long time, the X-Plane 11 pilots were eagerly awaiting the move from OpenGL to Vulkan as a graphics engine, but now it's finally here. As of today, X-Plane 11.5 is available as beta, which allows the flight simulator to be rendered over volcano and metal for the first time. This should primarily bring a considerable plus in performance. A full list of features of the new version as well as some important aspects of the new graphic engines can be found in this post on the X-Plane blog.
Activation of rendering via volcano and metal
If you want to try Vulkan, you can simply change the rendering in the option to the new engine. After a restart of the simulator it will run in this environment. You can see this by a corresponding note in the start screen. However, it is important to note that not (yet) all add-ons are executable under Vulkan.
About the Author

Mein Name ist Sascha und 2011 habe ich Flusiboard gegründet. Heute kümmere ich mich nicht nur im Hintergrund darum, dass alles so gut wie möglich läuft, sondern schreibe auch hin und wieder Artikel und bringe mich gerne auch im Forum mit ein.