The history of art is a repetition of moves away from Mannerism. A tool used in this movement is illusion. Illusion is a state in which a discrepancy exists between what is happening physically in real space and the real-space model in the brain in unconscious information processing from sensory stimulation to perception and cognition. When the discrepancy is noticed, attention is strongly aroused and a strong impression is obtained, which is very effective as an artwork. This paper introduces some of the conventional works of art related to illusions and discusses the artistic concepts behind the individual works. The author, an engineering researcher, will then introduce his intentions by discussing the process that led to his expressive activities in the art field and the relationship between his research and his creations for each sensory modality.