If you don’t have an XR headset but you want to develop OpenXR apps, you can use Meta XR Simulator! It’s great.Download it from hereopen in new windowYou will get a compressed file, and you have to extract it and get the necessary files.We only need the MetaXRSimulator folder. Copy it to somewhere on your machine, for example, C:\MetaXRSimulator.There are two options to configure the currently active OpenXR runtime on Windows:I recommend you to use an temporary environment variable (XR_RUNTIME_JSON) in the IDE or the terminal to set the currently active OpenXR runtime, which will not replace the system default OpenXR runtime.After configuring the environment variable, just run your OpenXR apps in the same terminal!Have fun!