Spanish School 20th century.Untitled, 1979.Silkscreen on paper. Copy 65/100.Signed and dated in pencil.Measurements: 70 x 50 cm.This piece reminds us of Yturralde's study of perspectives in which, with his figures, he plastically confronts the custom of perception with the analysis of its structure. They are three-dimensional forms formed from two-dimensional data capable of deceiving the eye of the spectator, who seeks a logical analysis and configures meanings, finally opting for the confusion transmitted due to the perception of confusing stimuli. In short, this work is based on the search for a direct action on optical sensitivity.