Try using the keyboard short cut to toggle "start/stop" using the "stay" and "keep tracking" options. From the FTNoIR manual: Keyboard shortcuts To influence the facetracker while 'in-game', shortkeys can be defined to: Center view; Stop/Start the tracker; From version 1.5 on the Start/stop shortkey has two extra options, which are active when the state is 'stop' : View: When 'Zero' is checked, view will be reset to '0'. With 'Stay' selected, view will freeze in the current position. Engine Tracker: With 'Stop Engine' checked, the tracker will stop face-tracking in 'stop'. This reduces CPU-load significantly. However, to 'start' again takes time. When 'Keep tracking' is checked the tracker-engine will not stop and 'start' will be much faster.