Shadow Casting Panel
Shadows are information.
In the "shadow projection plate," the visual information (pixel values) of two different images is stored on a single medium. Each of these two images is visible only under specific conditions.
When one image is visible, the other is not. Which image appears depends on the position of the light. Depending on the angle of illumination, the many small plates cast different shadows.
by Drzach & Suchy
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