3D Paper Optical Illusions from www.urdjuret.com 2014-06-18

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* Axis41 Year-of-the-Dragon
* Brain Busters Dragon (German instructions, but see the other images for help)
* Cat Illusion
* Cat Illusion Neko
* Chucky
* Chun-Li
* Coati Studio
* Cow 3D
* Dog Trick Academy
* eChalk Boxer the Horse (Including "Colour Your own" version)
* eChalk Buttercup the Cow (Including "Colour Your own" version)
* eChalk Cath the Cat (Including "Colour Your own" version)
* eChalk Cheddar the Mouse (Including "Colour Your own" version)
* eChalk Dewi the Dragon (Including "Colour Your own" version)
* eChalk Ernie the Rooster (Including "Colour Your own" version)
* eChalk Gruff the Dog (Including "Colour Your own" version)
* eChalk Jack the Hare (Including "Colour Your own" version)
* eChalk Jemima the Duck (Including "Colour Your own" version)
* eChalk Sir Learnalot the Knight
* eChalk Skully the Skeleton
* eChalk Vivienne the Vixen (Including "Colour Your own" version)
* Froggie (2 color versions)
* Horse (Not english instructions)
* Iron Man
* Jerry Andrus Original Dragon Illusion (Black, Blue, Brown, 5*Green, Purple, 2*Red)
* Joker
* K-9 - Doctor Who (With/without lines. No instructions, see other images for help)
* Kidadoweb Elephant (French/English Google translated instructions)
* Kidadoweb Hippopotame (French/English Google translated instructions)
* Kidadoweb Kangourou (French/English Google translated instructions)
* Kidadoweb Perroquet (French/English Google translated instructions)
* Kidadoweb Singe (French/English Google translated instructions)
* Lennon Dog
* Look at me Boo (Another hollow-face illusion)
* Moving Skeleton Sculpture
* Mr. Skully
* Oidon Dinosaur
* Onslo the Ren Dragon (2 color versions)
* PaperBee Pink Haired Girl
* PaperMe Green Haired Girl
* Poochyena (No instructions)
* Robocop
* Rocko Schnauzer (No instructions, see other images for help)
* Samsung Brown Dog (No instructions)
* Samsung White Dog (No instructions)
* Sandra Schön 3D Paper Monster (No instructions, see other images for help)
* Slime Monster
* Spider Man
* Storm Trooper
* Super Robot Dog
* Sycamore Sam
* T-Rex (No instructions. 3 colors; Green, blue and red)
* Vega
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These creatures are more than ordinary decorations, they are optical illusions!
A picture says more than a thousand words, but in this case we need videos to
demonstrate. When you move around it seems like the creature follows your movement
and turns its head, looking at you.

How does it work? If we move around when viewing a solid object, our brain knows how
the object we are looking at should behave. However the dragon gives us the wrong
clues, because we mis-interpret what its shape is. We assume that the nose of the
dragon is pointing out towards us, but in fact the dragon's head is concave.
This is called a Hollow-Face illusion.

Now you can build one yourself! Print it with your printer on regular paper, for
example standard A4, or use thicker paper. Then cut it out, fold and stick using
glue. That is all!

Tips:
- Many of the illusions are assembled in a similar manner, so if the illusion you
want to build doesn't have understandable instructions, see another one for help.

- For OPTIMAL effect, COVER OR CLOSE 1 EYE, to shut off your brain's access to true
depth perception, forcing it to interpret on shape and light only. Two eyes may
work. One is better.

- Bright but diffuse lighting. Lighting which is too harsh can create shadows which
break the illusion.

- On the dragon's head and mouth, tape/glue the tabs as shown, but DON'T sharply
fold the paper where unnecessary. Seeing creases doesn't help.

- Use thicker paper than the cheapest printer muck, but not too stiff. It's too easy
to get in situations where light comes through from the rear.

- When cutting along the edge behind which the tabs will be attached, CUT OFF THE
BLACK OUTLINE so that the colors blend unbroken.

- If you look at it for the first time ever, it might take a minute or so before you
see the effect.

Enjoy!

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