Shiny Shells Tree(s)

Here and there, when I have some free time I like to make autostereograms like the one above.
Very simple to use: click the image for a bigger version, cross your eyes, and relax. A nice 3-D image should appear in your mind.
Deepen your knowledge on optical illusions here.
See more optical illusions your mind can digest here.
Two books by my friend Al Seckel you might like to read - Optical Illusions, Masters of Deception. Have fun.:)