Have you tried turning off Asynchronous Spacewarp with the Oculus debug tool?
https://developer.oculus.com/blog/asynchronous-spacewarp/
C:\Program Files\Oculus\Support\oculus-diagnostics
Run OculusDebugTool.exe as admin
The setting is under “Service” about halfway down.
Or if it’s already “off” try setting it to Auto.
Try this mod for GTAV
Works great for me when using modded cars.
I’m playing through Thief 2 with it, check the big list RJK_ posted.
3D doesn’t quite work, but it still has head tracking.
Xen really stands out with VorpX, no pun intended
Confirming the -oldgameui launch option works, it doesn’t affect anything other than the main menu.