A viewing device and method are provided for use with an image
transparency having an associated tracking memory. The viewing device has
a display adapted to present at least two illumination patterns, a reader
device for obtaining data stored in a tracking memory of an image
transparency positioned proximate to the display surface, and a control
processing unit. The control processing unit is adapted to receive the
obtained data and to generate more than one illumination pattern with a
first of the illumination patterns formed for passing through the
transparency and second of the illumination patterns formed for viewing
on the display without passing through the transparency, wherein the
appearance of at least one of the illumination patterns is determined
based upon the data obtained from the tracking memory.