The pack of shaders for Unity, which will help you to make camouflage materials easily.
You can create dozens of various colorings for your model by using different combinations of masks and colors. Let your players to create their own unique variants of camouflage just by letting them to control the patterns and colors, whichever they like.
http://alt3d.ru/index.php?page=camo-shaders-pack-for-unity