Apollinaire and Picasso saw his paintings then visited him; Apollinaire became an important friend, and led him to meet Jacob, Derain, Braque, Léger and Brancusi. Tzara asked for a painting for the first Dada show: Breton included him with the surrealists. He met Carrá in a military hospital and strongly influenced him, the friendship eventually souring. Éluard visited him in Rome, where Casella and Pirandello were among a theatrical circle he mixed with. He exhibited and kept in touch with Prampolini, designed sets for Diaghilev, and wore a black tie for 25 years after his brother and comrade Savinio died.