I've been working with a game character model extracted from Paladins: Champions of the Realm. I'm really new to blender and I wanted to get the model so I could understand character modeling better.
The problem is that, after rendering the model, I noticed a seam at the middle of the character's face that's causing a weird problem, which resembles the normals from the other side of the face to be inverted. The faces are pointing the right though.
Removing the normal map solves the problem with leads me to think the normal map itself is the problem, but after trying to paint the normal map manually in photoshop it remained the same.
Aaand the .blend file: