Everett Longley Warner (July 16, 1877 – October 20, 1963) was an American Impressionist painter and printmaker, as well as a leading contributor to US Navy camouflage during both World Wars.

His mother was descended from a line of prominent missionaries (the Riggs family), who worked extensively for years with the Dakota Sioux Indians, translating and preserving their traditional language.

In 1903, with earnings from his painting sales, Warner traveled to Europe (he would visit there again four years later), where he studied in Paris at the Académie Julian, while also making sketching trips to Italy, Germany, Spain, the Netherlands, and other countries.

Ironically, at around this time, an inevitable decline began in the career prospects of all these young artists, many of whom were very gifted, largely because of the interest in Modern Art, which had been loudly introduced to the American public in 1913 at the famous New York Armory Show.

For many years, one of his closest friends had been the MIT-trained scientist and Paris-trained artist Charles Bittinger (1879–1970), who would later play a prominent role in World War II ship camouflage.

In February 1918, Warner accepted a commission as a lieutenant in the US Naval Reserves, and was assigned to manage a design-based subdivision (in Washington, D.C.) of a newly formed American Camouflage Section.

Concurrently, a research-based subdivision was set up at Eastman Kodak Company in Rochester, New York, under the direction of Lieutenant Loyd A. Jones, an optical physiologist.

His escort during that visit to the US (during which he lectured at harbors at Boston, New York, Philadelphia, and Norfolk on the purpose, design and application of dazzle painting) was Everett Warner.

In planning the exhibition of these, it occurred to him that they should not hang on the wall, but be positioned on the floor, flat and face-up, while the audience would view them from the side, at an oblique angle (as in anamorphosis), thereby enhancing the feeling of depth.

[3] In the summer of 1942, after the US had entered World War II, Warner (then age 65) was asked to return to the Navy, to serve as Chief Civilian Aid to Commander Charles Bittinger (his close friend from earlier years) in the design of ship camouflage.