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 of changes. It is influenced partly by early US Jungle Camouflage patterns, such as "Duck Hunter"/"Frog-Skin". DPCU was developed following aerial photographs of the Australian terrain to determine which colours and patterns would be most suitable for camouflage uniforms. The selected five colour pattern consists of a greenish sand coloured background with randomly arranged spots of orange-brown, mid-brown, leaf-green and very dark green overlaid. While a mid-grey tone was included in early test uniforms, this was omitted in later uniforms in favour of a second brown tone. The standard DPCU works in areas from arid bushland through to tropical jungle