In the following year, he moved to the United States to study in the Parsons and in the AIGA, in New York City, until 1955.
There he became acquainted with the works of Robert Rauschenberg, Jasper Johns, Cy Twombly and with Pop art in general.
Lee also traveled to Paris, where he attended classes at the Académie de la Grande Chaumière and in the atelier of Johnny Friedlaender.
With Maria Cecília, Bernardo Cid, Otto Stupakoff and Pedro Manuel Gismondi, among others, he established a group dedicated to magic realism.
Lee died on September 12, 2010, in São Paulo, at the age 78, due to pulmonary aspiration and cardiac arrest.