... 'eMotionSpheres'. The indoor GPS was already used for the floating spheres and was further developed for the 'eMotionButterflies'. The improved frame rate of the cameras gives the system even greater precision, which was a basic prerequisite for the precise tracking of the 'eMotionButterflies'. Compared to the 'eMotionSpheres', the artificial butterflies are very agile and always on the move. This makes their autonomous behavior and external coordination more complex.