Every time I put my Normals on it remove shade smooth. I tried it on an other model and it works fine but not on this. I watched a video to fix that but it was on blender 2.8 and it was only a sphere.
With the edits you made, it looks like when the normal map's color management isn't set to
To fix this, got to
Shader Editor, look at your normal maps'
Image Texture node, and set its
Color management to
non-color. Do this for every different material that has a normal map.
As a rule of thumb, any texture file you use for anything else that pure color should most likely be set to
non-color color management. Issues may not be as obvious as with normal maps, but they are here.
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