Can I paint a mesh that is mirriored...but have not applied the mirror?

Does Blender paint the entire mesh when a mirror modifier is on the mesh (but I have not hit the “Apply” button)?

Or must I apply the modifier before I set up my UV mapping?

Thanks for indulging a noob on this!

If you want all your faces to have their own unique UV space, of course you should apply the mirror modifier before unwrapping.

Ok thanks helluvamesh. I was doing some tests and the mirrored side wasn’t showing…even after the uv mapping was painted and applied. Unless I mirrored before setting the uv’s it did not work.

Thank you for taking the time to answer my question.