Incredible 3D artworks created by Xia Xiao Wan using special coloured pencils on sheets of glass. Although the effect looks fantastic in a still photo, I’m sure you really need to see these in real life to fully appreciate them.

Manchester born artist, David Spriggs also uses a similar technique (plus there’s video footage of the the artworks on his website for a better idea of the effect).
You have to wonder what effects could be achieved using transparent video displays.