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
Ship camouflage was applied to other destroyers, a few cruisers, and numerous small warships which maintained the scheme through 1944 for use in coastal waters. No Admiralty camouflage section was established until October 1940. Admiralty camouflage schemes promulgated in 1941 were not universally adopted because of difficulties with operating schedules and shortages of some paint pigments. Nearly all destroyers and larger ships wore an Admiralty disruptive camouflage scheme by late 1942; but Commonwealth captains executed official camouflage schemes with greater variation than was customary with American measures. Initial Admiralty disruptive camouflage schemes employed polygons of varying shades of gray, blue and green