Just for the record, I did try this but it didn’t have the intended effect!
Performance was pretty poor. I think the WMR resolution setting applies last of all, even after the OpenXR scaling - when you think about it, that’s no real surprise.
Basically, both the sim and OpenXR were still rendering at a pretty high resolution, so the load on the CPU/GPU was as high as ever and performance tanked!
Worth a try, but not a good solution.
Anyway, the new version of the OpenXR runtime detailed in this thread is here now, so we can all have fun setting OXR to 20% 