Military camouflage isn't that specific, though the general colour does vary. So desert camouflage is different from temperate camouflage. But it isn't practical to change clothes depending on where you're standing. Civilian stuff, such as the trademarked "Realtree" type, can be a lot more specific. I can't find the reference at the moment, but the new USMC pattern tries to combine the two main methods. The articles I found referred to "Symmetry Breaking", affecting the apparent shape of an object, as something different to blending with the background. Most military camouflage has apparently been of the first sort, though some early military schemes appear to have tried for blending. Apparently a tiger's stripes work by symmetry breaking, while a leopard's spots are meant for blending. And the way the chemisty controlling fur patterns works, animal camoflage can't do both at once.