Landscape paint zigzag problem

Hello. As you can see in the photo above, zigzag images occur in my landscape paintings. Even though I used the Smooth tool, I could not get an efficient result. My goal is to give the impression of gravel instead of grass in areas where tires have stepped on, as if a vehicle had passed over the grass. I am waiting for your alternative solution suggestions.

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That’s normal.
You have a low resolution on the labdacape paint which acts almost like vertex paint.

To lessen that effect you have to lerp something into the alpha values - an image, a height blend, or just use pre-made meshes instead.

I suppose you can also use Decals to make more convincing localized pathways…