Try the MAGIC EYE web site for a good explanation and some extraordinary tricks.
http://www.magiceye.com/
Enjoy,
Dan

"Dr. Imre Bartfai" wrote:

>> there are a lot of so-called "magic images" - I even saw a book filled.... How does it work?
>> Does it require some personal skill or training (or maybe inborn gifts)?
>
> Thank you in advance.
>
> Regards,
> Imre

--
Daniel Hart
Embedded System Design Engineer
NBS Technologies, Inc. (Card Technology Corp.)
70 Eisenhower Drive, Paramus, NJ 07652, USA
+1 201 845 7373 x183    dhart@nbstech.com