The classic use for head tracking in gaming is moving the view independently of a vehicle or body: e.g. looking around the cockpit of a plane, particularly useful for WW2 dogfight simulation. This definitely requires pitch control. I can’t see WW2 dogfight simulation having a lot of use for eye tracking unless it was used as an elaborate joystick. My intention has been to put it to good use in Star Citizen for aiming without moving the head. I tried doing just head tracking with FaceTrackNoIR and the mouse emulation worked fine on the desktop, but made the mouse inside SC go bonkers always going to the side. I’m afraid it would be the same for EyeX. It’ll require some different kind of emulation.