Thread:Wardie1993/@comment-104549-20180716231153

Today's topic is these images: here, here, here, and here. I think you're confusing sourcing and licensing. They're all obviously based on the battle flag of the (or at least the more modern, rectangular variant, the so-called "Confederate flag"). You must reference that (the real-world design) in your source; you did not come up with that design from scratch. That doesn't mean you can't use it; as you rightly point out, the design of the flag is probably public domain, and if so, anyone can use it. But you have to give credit where it's due.

The same applies here, except that one is a variant on the present flag of the State of Mississippi. If there are others I haven't noticed yet, same principle applies to them too. Attribute in the source; then, if it's public domain, modify to your heart's content. 