I am currently painting a face bump map in blender. On the image you can see these lines that appear on for example the nose from the painted bump. The model is low res since this wouldnt change anything in the texture. Even without a brush texture these artifacts appear. I tested a 4k and an 8 k image but there was not even a difference..
Hope someone knows the problem.
Maybe one more: Is it better to paint the details of the skin or with sculpt and then bake an image?