An image generating apparatus includes an image display board having an array of member ports; a light source behind the display board; a translucent pigment sheet positioned between the image display board and the light source, the translucent pigment sheet including several pigment clusters, each pigment cluster including an array of translucent pigment areas, each member port in the image display board being rotatably fitted with a colorless translucent member preferably in the form of a translucent disk having a disk distal end which is substantially planar and positioned directly proximally of one of the pigment clusters. Each disk has a radially offset selective color admission structure admitting only certain selected wavelengths of light from the light source, each disk having a disk proximal end with a radially offset engaging and orienting structure in the form of a proximally protruding structure or an abrasive surface.