Anaglyphs and stereograms are old, old 3D technology. By tricking the eyes just a bit, they allow viewers to see a 2D photograph in “3D.” We can make anaglyphs and stereograms ourselves with just some photo editing software.

To do the demos in this section you will need:

• Markers, like Crayola classroom markers or alcohol markers

• Plastic color filters, particularly in red, magenta, cyan, blue and green

• A digital camera (cell phones work great)

• Photo editing software that supports layers and color channels, such as

  • Photoshop

  • Affinity Photo

  • Inkscape

  • GMP

• A stereogram viewer (for the ambitious, they pop up on eBay)