Pollock's ambition carried him far beyond the traditional unity of easel painting in search of a more monumental space and a total pictorial experience. (visual-arts-cork.com)
During this time Kandinsky shifted from the prismatic Expressionism of Der Blaue Reiter into pure abstraction and from easel paintings into set designs and murals. (nytimes.com)
(An early announcement in modernism of the inadequacy of easel painting as a single canvas was Rodchenko's Pure Red Color, Pure Yellow Color, Pure Blue Color, a work that consists of three physically separate canvases. (galeriebuchholz.de)