Scenic curtains have two or more art compositions which varies depending on illumination in a hall. Transformation of one composition to another one is possible owing to usage of fluorescent dyes and the materials invisible at usual illumination. As in an auditorium a light dies away, gradual transformation of one composition to another one comes to the overture to the forthcoming show. At the beginning of this transformation the curtain still completely belongs to the auditorium, and in the end it becomes an image of stage seizing a strong hold on spectators.