First load time with Metal and Vulkan will be surprisingly slow.If an add-on appears to not work correctly, you can disable Vulkan and Metal and restart X-Plane. In particular, when Vulkan and Metal are enabled, 3-d drawing callbacks and map drawing callbacks are not sent to plugins. Not all add-ons are compatible with Vulkan and Metal. See this article for specific hardware and driver requirements to run in Vulkan or Metal. You can tell if X-Plane is utilizing Vulkan or Metal via the startup screen or by viewing driver information in the beginning of Log.txt. Modern rendering via Vulkan and Metal are enabled by checking an option in the graphics setting screen and then restarting X-Plane.
