Abstract: A concave mirror is positioned at an angle to a flat surface containing a picture so that a viewer can view the picture as reflected to his eye by the concave mirror. Masking is provided about the marginal edges of the concave mirror to define within the masking a reflecting area less than the total area of the picture. As a result, the degree of visibility of the top, bottom, and side portions of the picture can be changed by the viewer shifting his line of sight, the masking means defining a window which appears closer than the viewed picture so that a three-dimensional effect results. Perspective and keystone effects resulting from the angular relationships are compensated for by varying the width dimensions of the masking and the manner in which the picture is formed on the flat surface.