Of course, the part of the video that shows the pencil moving underneath the cube is down to clever editing (no-one's drawing ...

Tom Deininger builds intricate collage sculptures using ... Narrator: By using trash to create art, his sculptures become more than just an optical illusion.

In our today’s optical illusion challenge ... At first, the image appears cheerful and busy—a collage of European-style buildings in shades of pink, blue, orange, and purple.