Abstract: A rear projection screen assembly comprising a transparent screen suitable for passage therethrough of a light beam emanating from a rear projector apparatus, means for supporting the screen such that it is positionable to intercept the light beam, means in operative association with the screen, for supporting at least one sheet of translucent material, such that the transluscent material can be releasably fixed to the screen adjacent a screen surface opposite the screen surface first encountered by the light beam; and a kit suitable for construction of a rear projection screen assembly; and further includes a method of graphically modifying an image projected by a rear projection apparatus.