Make a Sugihara Circle/Square Optical Illusion Out of Paper

Awesome illusion

David Richeson: Division by Zero

Yesterday I explained the mathematics behind Sugihara’s Circle/Square Optical Illusion, which appears in this video.

Today I created a printable template from which you can make your own version of Sugihara’s object.


Click the following image to download the pdf.


Making the shape and seeing the illusion is easy.

  1. Cut out the figure at the top of the page.
  2. Fold a sharp crease along the dotted line.
  3. Tape the left and right edges together.
  4. Fold a sharp crease along the taped seam.
  5. Lightly squeeze together the creased sides so that the shape opens. Looking down on the shape it should have the shape at the bottom of the printout.
  6. Close one eye. Look down on the shape at a 45 degree angle so that the two creases line up with each other.
  7. Then turn it around 180 degrees and look again.

View original post


Leave a Reply

Fill in your details below or click an icon to log in: Logo

You are commenting using your account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s