I don’t know how they did it in the movie, but i remembered that Michel J. Anders (aka varkenvarken) wrote once this osl ‘Hagelslag’ script that could be used for scratches. I did a very tiny modification to the script so it also outputs the tangent vector corresponding to each scratch, that can be plug into the anisotropic shader. And the results are quite similar.
scratches.blend (431 KB)
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