As time went on, Marval’s style loosened, with subjects ranging from sprawling bouquets to women bathing in dappled sunlit scenes. Internationally renowned, exhibiting in London, Prague and Tokyo, she also took part in 1913 in the groundbreaking Armory Show in New York City, the first exhibition to propel European Modernism to the other side of the Atlantic, and in 1919 exhibited at the Metropolitan Museum of Art.