Render shadow lines problem Hi there well I'm kind of newish to Blender and my problem is when I do the Rendering I get some ,,shadow lines'' you can see them if you zoom in at the head, how can I avoid them or what did I do wrong in the settings.

Thanks for the help :P
Thx to Serge L I could figure out with different tries of the denoiser size and the amount of samples to get rid of the artifacts, the shadow/color lines could have been caused of the to dark scene so they mostly disappeared with more or brighter light, now Im happy with the result and can go on thx for the help guys.