lifehacker.com — If you're a fan of optical illusions, you'll love this simple how-to tutorial from the maker of the infamous Spanish castle illusion, John Sadowski. It's amazing that it's so simple to make a really good illusion; all you need is a good photo editor and an interesting picture
Nov 12, 2006 View in Crawl 4
billblaskeyNov 13, 2006
Did someone really just spam digg with a link to a Jennifer Lopez biography... wow. just wow.
syco123Nov 13, 2006
and its forever old. LAME!
suplyndmndNov 13, 2006
Where is the optical illusion? It's a mouse over. I was doing this "optical illusion" in 1998. Buried as lame
gandalfanNov 13, 2006
Go here:<a class="user" href="http://www.johnsadowski.com/big_spanish_castle.php">http://www.johnsadowski.com/big_spanish_castle.php</a>My eyes turn red, lol.
buddydvdNov 13, 2006
check out <a class="user" href="http://myopticalillusion.com">http://myopticalillusion.com</a>This one actually lets you upload your own image.
sinner0423Nov 13, 2006
lol, you guys.i see some confusion about how this is supposed to work.go here : <a class="user" href="http://www.johnsadowski.com/big_spanish_castle.php#">http://www.johnsadowski.com/big_spanish_castle.php#</a> (courtesy of m4tt3r)make sure you aren't moused over the image. you will see a black dot. stare at the black dot for 20-30 seconds, then mouse over the image. the image will appear as if it's in color, when in fact, it's actually a black & white photo.you win at the internet.
sik0fewlNov 13, 2006
Instructions I used for GIMP:On the new layer:Layer -> Duplicate layerLayer -> Colors > InvertOn the bottom layer:Layer -> Colors -> DesaturateCreate a new layer on top of the other layers:Set "Mode" to "Value" (from "Normal")Fill the layer with gray (#808080)Layers -> Merge downCreate a new layer:Draw dot in center of imageI'm not sure if the "Value" mode filter works quite as well as the Photoshop "Luminosity" filter. Does anyone know how to achieve this affect?
sunalexSep 2, 2008
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