Homepage › Forums › Head (only head) tracking › Could it be possible to add freepie angle to HMD angles ? › Reply To: Could it be possible to add freepie angle to HMD angles ? 2019-02-21 at 18:02 #6283 Greg DriverKeymaster @lefuneste i have quesiton about your ps eye tracking and pimax. do you have problem with drift ? do you have any reset button ? i also assume you calibrate headset in driver4vr in the direction how you calibrated psmoveservice. can you confirm?