I have an issue with my UV seams. It looks like they affect the vertex normals as well and I don't know how to clean this.
EDIT Here is a scene and some textures to support the question:
In this scene, there are two objects that are lit differently (the only difference is the UV unwrap) and I don't understand why. I mean, it appears the visible seam comes from the lighting not the textures
Thank you for your help.