Are camouflage patterns copyrighted?

Are camouflage patterns copyrighted?

Hello, does any of you know, if it is legal to use common camouflage patterns in open source projects?

I made some photos of military camo clothes with the intend to use them for game art, but now I'm not sure, if that is even legal, since I read somewhere that camouflage patterns are copyrighted or at least some are.

It is not special camo patterns, just the generic ones you get on all the clothings, like woodland, urban etc so they cannot be that copyrighted, if everyone uses them for their clothes, or does everyone who uses them buy a license?