At least for the cave in the article it's thousands of square meters of art. The art looks like parallel lines made by dragging fingers over the surface. I gue

At least for the cave in the article it's thousands of square meters of art. The art looks like parallel lines made by dragging fingers over the surface. I guess you could take some pictures, but it's not the kind of art that really needs high res 3d scans. In this case it's more the concept of "there was a human that did something here a very long time ago", rather than how the art itself looks. The vandalism only covered a small portion of it, but I suspect the vandals didn't even realize they were overwriting anything, since it's really not very obvious as art - it just looks like lines.