Interesting art

I wii introduce about trick art.
Trick art is very interesting and strange.
I often watch trick art in You Tube.

In this photo, Water and hose is painted on the floor!
But, this painting looks Three-dimensional.
It is very difficult to draw.

This is a book shelf.
But if you watch carefully, you will notice painted person.
this is my favorite picture.
I want to see more trick art.

http://youtu.be/QPTlRxi8iZc