Above Cover of Art News magazine (restored), November 1942, with a photograph of personnel and artillery broken up by the shadows of an overhanging net, in which canvas strips (or other materials) have been interwoven. This was widely practiced during both World Wars, and was sometimes known as "umbrella camouflage." For more information on this technique, see "Kelly and Camouflage" (p. 115) in E.C. Goossen, Ellsworth Kelly. New York: Museum of Modern Art, 1973 (as shown below). Kelly was a US Army camoufleur during WWII.
SEE ALSO
Nature, Art, and Camouflage (35 min. video talk)
Art, Women’s Rights, and Camouflage (29 min. video talk)
Embedded Figures, Art, and Camouflage (26 min. video talk)