NaturalPoint Tracking Toolkits (Point Cloud and Rigid Body) Users Manual   8. Tips and Tricks 8.1 Tracking Environment The Point Cloud toolkit and Rigid Body toolkit are designed to work in a wide variety of conditions, and the current generation of OptiTrack cameras are more robust and reliable than ever before. There are, however, a number of things that you can do to optimize their performance : Distance between the cameras and the user : The optimum range for tracking markers with OptiTrack cameras is between 0.5 to 6 meters. Lighting : We recommend turning off or dimming lights in the room and removing any highly reflective materials that are directly in the view of the OptiTrack cameras. You can easily check what the OptiTrack cameras are seeing by using the Calibration tool Camera Preview step. For details please see Section 4.2.2.   8.2 Tracking Markers To achieve the best 3D tracking performance NaturalPoint recommends the use of spherical reflective 3D markers which are available from our online store. The markers will be detected most easily when they are clean and there has not been any abrasion to the surface of the marker. If the reflective surface of the markers will come into frequent contact with skin or other surfaces then it is recommended to replace the markers on a regular basis.