HOw do you see those 3d hologram pictures?

[jfall]

You can go to http://www.eyetricks.com too -- there is a tool on there that allows you to generate your own, and it shows you what it looks like before all the extra stuff is added, so you know exact what you are looking for

 

[Jugernot]

It just comes natural, most time you won't be able to see em if you can't just by looking at them.