Quote - how are you handling the marker occlusion issue?

Having more cameras is a good solution as long as the host computer can handle the incoming data.  My PC is Pentium4 3Ghz.  When I have six OptiTrack cameras connected capturing 30 markers it uses about 60 to 70% of CPU. Also having more markers can prevent occlusion.  At least three markers(two if immediate parent bone position/rotation is already known) is needed to define position/rotation

Quote - Don't forget, some of the 12 of us are Mac guys...

Sorry my software won't work on Mac.  This is because there is no OptiTrack driver for Mac and also I am using DirectX for 3D rendering/calculations