Since there's a lot of confusion around this, here's quick guide on how I run the beast in VR as of today with all latest software/hardware:
player.JSON adjustments:
"Car Vibration Mult1":0,
"Car Vibration Mult2":0,
"Cockpit Vibration Mult1":0,
"Cockpit Vibration Freq1":0,
"Cockpit Vibration Mult2":0,
"Cockpit Vibration Freq2":0,
"Exaggerate Yaw":0,
"Glance Angle":1,
"Glance Rate":200,
"Head Rotation":1,
"Look Up/Down Angle":1,
"Look Roll Angle":1,
"Lookahead Angle":0,
Note, still not sure if angle values of 1 are best. I get head tracking feeling "stepped", not fluid, continual. I suspect angle values affect step between positions, and 1 degree might be too much.
Controls:
Map Enable Free Look/Center Free Look to be easily accessible, you will need to activate both very often.
Resolution:
You need to run rFactor 2 in Windowed mode. I recommend setting desktop resolution to match game window resolution. Otherwise, if you use VR resolution above desktop resolution, your mouse will be stuck in the rectangle matching desktop resolution. I am lucky here, my cheap monitor downscales any resolution above its native to native, so I was able to set desktop (and game) resolution up to 2560x2560 (did not tried above yet).
Now, aspect ratio is important in a sense that you need to be as close as you can to 8:9 ratio to eliminate wasted areas of screen that you do not see, but game still renders them. In practice, with 8:9 I can't zoom in and eliminate off screen areas at left/right side of vision. So, at the moment I am sticking with 1:1 ratio.
NOTE: For some reason, even despite 2160x1200 native resolution of CV1 (or 1080x1200 per eye), setting in game res above 1080x1200 improves the image. If anyone can explain that, please chime in.
vorpx in game menu (DEL key):
Mode: z-buffer
Aspect ratio correction: Pixel 1:1
Head tracking sensitivity: 0.20 (adjust to your liking)
Use in game:
• Start Vorpx
• Set Desktop Resolution to match your rF2 windowed resolution
• Start rF2 normally. You should see the game in HMD.
• In menu, zoom out by using Shift+Mouse Scroll
• In race:
○ Zoom in using Shift+Mouse Scroll
○ Enable Free Look
○ Center Free Look
Something I found useful in single player race to access pit menu:
• Pause game
• Zoom out
* Disable Free Look
• Do pit adjustments
• Zoom in
* Enable Free Look
* Center Free Look
• Resume
Enjoy!!!