Martin worked as a printer in Los Angeles in the late 1920s, and as an assistant to Mexican muralist David Alfaro Siqueiros in the early 1930s.
The industrialists prevailed and Martin painted an uncontroversial mural, Discovery (1941), depicting the prospector who founded the town.
Legends of Fernandino and Gabrileno Indians (1937) depicts overlapping scenes of Native American life and ritual, and the world being carried on the backs of giants.
Fourteen of his paintings from the North African campaign were published in the December 27, 1943, issue of Life, and brought him national recognition.
Trouble in Frisco (1938, Museum of Modern Art) shows a brawl between longshoremen witnessed through a ship's porthole.
The Undefeated (1948–49, St. Petersburg Museum of Fine Arts) depicts the 11th round of the June 25, 1948, World heavyweight boxing championship.
After the war he taught at the Art Students League Summer School in Woodstock, New York, settled in the town, and began raising a family.
The whole history of art, which can't help but affect one, will be filtered through your own personality to produce a sort of original statement.Martin married five times; four marriages ended in divorce.