Video mapping enriched by an interactive interlude when spectators were invited, in a playful way, to control parts of the visualization by their own body movements. More spectators were able to participate in the installation at the same time within a marked area right on the National Theatre Piazzeta, the final image depended on the number of spectators and their non-verbal communication. The installation offered an entertaining social game inviting more people to cooperate. Front of the building was brightened by an atmospheric animation with technicist images depicting the people moving within the marked rectangle. The spectators were scanned by several 3D sensors (Kinect) and the ever-changing visualization of lines connecting the individual spectators was created in real time depending on their postures.