Method and system for automatic composition and orchestration of a 3D space or scene using networked devices and computer vision to bring ease of use and autonomy to a range of compositions. A reference area is found in the images, in which the fixed portion of the images in a first one of the classes differs consistently from the fixed portion of the images in a second one of the classes. A piston is moveably mounted within the internal passage. The implant can have slits that open under applied tensile force.