Just want to show my appreciation. Open-source head-tracking with a PS3-eye has had a bad name somehow and to be honest, I experienced poor performance with facetracknoir a couple of years ago. Now however with the recent opentrack-releases, I cannot distinguish the performance between a tIR-unit and opentrack. Even in daylight the algorithm has no issues tracking my homebuilt IR-led side-clip and with seamless response times. Fantastic work!