Hi dhekra If you build your head of a horse as a different actor, then you can check what is the actor id that was clicked. I don't really understand your example, could you please explain it? Max -- View this message in context: http://vtk.1045678.n5.nabble.com/Camera-tp5721615p5721749.html Sent from the VTK - Users mailing list archive at Nabble.com.