Maril’s work was shown alongside prominent artists of the day such as Thomas Hart Benton, Charles Burchfeld, Edward Hopper, and Reginald Marsh in the 1942–1943 Annual Exhibition of Contemporary American Art at the Whitney Museum of American Art and later, with Georges Braque, Stuart Davis, Juan Gris, Marsden Hartley, and Georgia O’Keeffe in Twentieth Century Still Life Painting in the 1997 Phillips Collection exhibition. He established friendships with many others, particularly in Provincetown, an artist colony that included Milton Avery, who was his nearby neighbor from 1954–1960, and Mark Rothko, who lived next door during the summer of 1958.