1. Let’s make optical illusions!

2. What is an Optical illusion?
something that looks different from what it is : something that you seem to see but that is not really there

3. Types optical illusions
Blivet 
Bezold effect 
Ebbinghaus illusion 
Hermann Grid Illusion 
Necker cube 

4. Blivet – an undecipherable figure

5. Bezold effect – a color seems different due to its adjacent colors

6. Ebbinghaus illusion - an illusion related to relative size perception

7. Hermann Grid Illusion – ghost-like grey blobs appear in the middle of the black squares on a white background

8. Necker cube – an impossible cube with edges that are apparently solid beams

9. Individual Art Skills you’ve acquired in this class thus far:
Color Theory
Linear Perspective
Scaling/Proportion and gridding
Physical 3D modeling with assorted materials
PUT THESE TO USE WHEN PLANNING AND CREATING!

10. Individual assignment:
Pick one of the aforementioned types of optical illusions
Research those optical illusions in 2D
Attempt to recreate it:
SIZE: 8”x11” white paper
MEDIA: sharpie, pencil, and/or colored pencil. Ruler and compass if applicable.
TIME: 2 class days beginning now.

11. Group assignment (groups of 2)
Pick one of the aforementioned types of optical illusions
Research those optical illusions in 3D
Attempt to recreate it:
SIZE: no smaller than 10”x10”x10”. No larger than 12”x12”x12”
MEDIA: cardboard, poster board, foam core, toothpicks, popsicle sticks, straws, coffee stirrer sticks, paint. other materials, check with me first.
TIME: 5 class days beginning now.

12. Links to get you started