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
Aircraft camouflage aircraft nearly invisible from most angles, however the sun reflecting off it defeated it even before its lack of durability did. When the Germans fielded the Albatros D.III sesquiplane, its similarity from a distance caused them to be confused for Nieuports, both of which used the same combination of colours to match the terrain they were operating over. Additionally, the Nieuports lacked overwing roundels and the German crosses were not always easy to identify. The solution the Germans came up with was to replace the red-brown with purple, which from a distance still worked well as a camouflage colour, but