Hi
If you mean layout of cameras around the scene, take a look into docs:
http://docs.ipisoft.com/User_Guide_for_Multiple_PS_Eye_Cameras_Configuration#Scene_Set-upIf you mean the order of screens in iPi Recorder and in recorded iPiVideo files, then it does not matter for the program. Just for your convenience, you may choose to order them either clockwise or counterclockwise.
It is not necessary for an actor to face a specific camera. However, it is simpler to do the initial aligment of actor's model in iPi Mocap Studio if an actor is facing one of the cameras.