I am trying to create a Borderlands game-ready character, and I decided to use normal maps to preserve details from my high-poly model. It worked good, except for one thing: these strange curved lines. I Don't know the cause of them.
I made them with Zbrush...you can see those lines in the red rectangle in the second image.
They appear with every shader I use, so it's not AiToon fault.
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Sticky Of Bit Depths, Banding and Normal Maps