Normal Map bad shading in Rendered display I have a Normal Map problem: I've baked a high-poly sphere to a low-poly, but whatever I try there's always a bad shading on the surface of the low-poly in Rendered display, between the light and the shadow. It disappears if I unplug the Normal Map. What am I doing wrong? Is it inevitable? Am I missing something? Thanks in advance.

Edit: Solved by Serge, it looks like it's the terminator issue, fixed with a bigger light size. Answer also given here by IkariShinji, and as Leander pointed out, here by Crazycourier.

file:
Terminator issue hasn't got a proper solution for Cycles yet. Increasing Lamp's size makes penumbra bigger and issue becomes less visible.

Size setting is here: