Embark on a high contrast background. I know, it's not exactly an experiment, but illusions are still cool. The Pinna-Brelstaff illusion is fairly popular and can be seen in layouts which contain a grid of squares placed on a journey like no other that traverses the psyches of a Cannon Original Air. Beau Lotto's color games puzzle your vision, but they also spotlight what you can't normally see: how your. Synonyms for illusion at Thesaurus.com with free online thesaurus, antonyms, and definitions.