What version of Godot are you using?
Edit: If you haven't already, check that you're using the right normal configuration. I think Unity defaults to DirectX which has the green channel of the normal map flipped.
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What version of Godot are you using?
Edit: If you haven't already, check that you're using the right normal configuration. I think Unity defaults to DirectX which has the green channel of the normal map flipped.
I'm using Godot 4.1.1.
According to Unity they use OpenGL https://tinyurl.com/2p8frxtf Unity uses Y+ normal maps, sometimes known as OpenGL format.
The same as Godot https://tinyurl.com/by9tsm3f Godot requires the normal map to use the X+, Y+ and Z+ coordinates, which is known as an OpenGL-style normal map.
The problem actually resolved itself already. I applied the textures to another MeshInstance3D and it worked there for some reason, I have no idea why it didn't work on the first mesh...