The answer is affirmative, although we do not know to what extent these were actually put into practice. Among the most ingenious was a method that originated with an American Navy camoufleur named Everett L. Warner. It was he who oversaw the ship camoufleurs in Washington DC at the Design Subsection of the US Navy’s Camouflage Section. Not only did he originate this method, he also documented it with photographs and described it in an article that was later published.
Here is what we know about his innovative method of producing new schemes for the sides of ships: At some point, he discovered that the painters at the harbors, who were applying the schemes to the actual ships, did not fully understand how various distortions worked. As a result, he initiated the practice of requiring small groups of those painters to attend training sessions at the Design Subsection. The distortion effects were a challenge to explain, and Warner soon found it was helpful to have on hand a number of cut-up, variously-colored wooden scraps to use in demonstrations.
One day, while preparing these demonstrations, Warner inadvertently arranged a number of these scraps of wood on the surface of a table. With no particular purpose, a wooden model of a ship, painted in monochrome gray, had been placed on the same surface, so that it served as a contrasting background. At that point, Warner realized that he could easily rearrange the scraps, in all but an infinite number of ways, and then use that arrangement as a flat, confusing pattern on the surface of the ship. If the scraps were aligned at an oblique angle, the plain gray ship behind them would appear to be positioned at the same angle. more>>>