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
Disruptive Pattern Camouflage Uniform grey, sand, olive-green and red-brown. The new variant was designed to overcome issues associated with operating in and around the "green belt" areas of Afghanistan (particularly in corn fields) where the DPDU was too light in colour but where the DPCU was too green for open areas. Trials however, showed that in most areas the original DPCU performed more effectively than the new Midpoint camouflage and it was not adopted. One criticism was that the new camouflage used colours that were still too biased towards desert operations. Australian special forces operating in Afghanistan have been seen wearing Crye's Multicam camouflage.