On the Universe . If I could make musicians of you all, it would be to your advantage as painters. All is harmony in nature, a little too much, or a little less, disturbs the scale and strikes a discordant note. Walter Pach, Ingres , 1939. The secret of drawing and modeling resides in the contrasts and relationships of tone.
Art is harmony.
Harmony is the analogy of contrary and similar elements of tone, of color, and of line, considered according to their dominants, and under the influence of a particular light, in gay, calm, or sad combinations . . . . From the Fourteenth to the Twentieth Century , edited by Robert Goldwater and Marco Treves, 1945. When more such lines are placed at an angle across the first, it is called cross-hatching. Artists use this technique, varying the size, closeness and other qualities of the lines, most commonly in drawing , linear painting , engraving , and ethnic . Hatching is also referred to with the French word hachure.