We all know nightclub lighting can play tricks on the eye, harsh fluorescent lighting may reveal a different face, but did you ever think you could mistake Albert Einstein for Marilyn Monroe?
Drzach & Suchy, (previously mentioned on the Shapeways blog) have been working on a series of 3D printed shadow casting panels that allows multiple images to
be encoded within a single physical object, a white panel, which
displays the separate images under specific lighting conditions.
"The underlying principle of our technique is based on a simple
observation: the shadow cast by an object depends not only on the
object itself, but also on the light; therefore the same object
under changing lighting conditions can totally change its
With Conversation, the technique is used to make an image of Albert Einstein transform into an image of Marilyn Monroe. See the video below for a vaguely unsatisfying demonstration.