For the examples in this page, inducing stimuli were created in a variety of ways and photographed. The idea was to see what happens when potential inducing stimuli are put in and environment.
You can see what happens if the red pie pieces are placed at an angle to each other.
You can see what happens if the red pie pieces are placed at different distances.
For the next examples, the red pie pieces were placed on plexiglas.
You Although many of the examples showed strong effects, the one below was relatively weak due to the strong lines of the plant.
Elaborate equipment is not necessary. For the two following examples office stick-os were place on a plastic yogurt top.
You could even make an illusory contour self portrait by using a mirror.
And figures can easily be created on inkjet film, laser transparencies of copier transparencies.
Or, you could use "real" pie pieces and then eat your stimuli when finished.
