I have modeled this millstone and have a little texture issue, when I use normal map. The one on the left side is without Normal Map, the right one was uploaded to the TMT with a Normal Map. As you can see, there are noticeable texture errors on the right stone. After I last uploaded the stone on the left, I am quite satisfied with this version.
But I would like to know what I did wrong with the normal map?
But I would like to know what I did wrong with the normal map?