Can third-party or custom made passive markers be tracked with OptiTrack cameras?

OptiTrack cameras can track any surface covered with retro-reflective material. For best results, markers should be completely spherical with a smooth and clean surface. Hemispherical or flat markers (e.g. retro-reflective tape on a flat surface) can be tracked effectively from straight on, but when viewed from an angle, they will produce a less accurate centroid calculation. Hence, non-shperical markers will have less trackable range of motion when compared to tracking fully spherical markers. 

A variety of retro-reflective passive markers that are optimized for motion capture are available for purchase on our website.