Texture Decay [Geo Nodes]
Does this work if my original texture is using a UV map?
Yes, simply re-assign the original material at the top of the 3DN-TextureDecay modifier and your texture will display the same way as before just with weathering over the top.
What if my object has more than one material assigned?
Unfortunately, this is one of the limitations of this modifier setup. However, separating the geometry by material and adding a TextureDecay modifier to each is a work around.