I think you are looking at moiré
Look for Moiré pattern in wikipedia.
A well know thing in printing, scanning procedures.

Or if you have waves on your object, as in the example also, it is the flow of the uvmap over the object file.

Moiré dissapears when you change the distance from camera. A close up should show no moiré.
Uv map flowing does not change and is allways there.

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