Camouflage there is no background, the principal methods of camouflage are transparency, silvering, and countershading, while the ability to produce light is among other things used for counter-illumination on the undersides of cephalopods such as squid. Some animals, such as chameleons and octopuses, are capable of actively changing their skin pattern and colours, whether for camouflage or for signalling. It is possible that some plants use camouflage to evade being eaten by herbivores. Military camouflage was spurred by the increasing range and accuracy of firearms in the 19th century. In particular the replacement of the inaccurate musket with the rifle made
Middle East Command Camouflage Directorate bombs being dropped on wooden railways by an undeceived enemy. Barkas noted that "camouflage men must be among the few otherwise sane beings who yearn to be bombed." The pioneering effort's success was achieved in a few weeks, amidst severe shortages of men and raw materials. The writer Julian Trevelyan recorded that During the Eighth Army's retreat across Libya in 1941, the camouflage officer and former film art director Peter Proud and the camouflage sergeant William Murray Dixon found themselves trapped in the port city of Tobruk. Proud quickly set up a camouflage unit, acquiring a section of Australian engineers,