Erratic strokes/marks can be used to add texture and/or create shading that indicates form. The changes in directions can be sharply angular or more curved. Erratic strokes/marks can also be dashes of various length that go in all different directions. Since erratic strokes/marks are not limited to any pattern or order, the energy embodied in each mark can be a clear expression of the emotions of the artist or can be used by the artist to indicate the emotional state of a character being depicted. This lack of order can also create a frenetic feeling in the piece.
Featured: The Japanese Footbridge, Giverny by Claude Monet.