A metaphor for the interaction with a human being and for the process of entering the universe of his/her feelings. CAVE visitors can inter-react with the emotions of a “space face.” Their individual movements trigger changes of feelings represented by compositions of color and form. Gesichtsraum (face space) has been designed as a pilot project, as an experimental laboratory to arrive at a new interrelationship between art and our reaction to it. The ultimate objective is to be able to simultaneously feed back emotional responses to a work of art into the work itself and to thereby modulate its form.