As per the title, people using ReVive for Condor2 can no longer use any MSAA settings and must disable it to get the headset to work. If it is left active, when you load a flight the screen remains black in the hmd though you can still see the timer and the audio is playing. Desktop mirror is unaffected by it so you can see the proper landscape/plane there but not through the headset.
For now I'm just disabling it to be able to fly however it makes the graphics jaggy and the scenery full of shimmer. I have a Valve Index but this affects all ReVive users until it is fixed. It used to work fine and I'm not sure which patch broke it but it's been this way for at least a few months.