Here’s how the normals look when I just output them from the normal shader:
But straight from the texture itself, from my eyes, they look ok (but normals have always been a foreign language to me)…
And finally, how they look when put together…
I’ve tried changing every kind of space (world space etc)
You need to switch the color space on your image node from SRGB to Non-Color.
Yes, it really is that simple. No, you’re not the only person this has stumped.
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That might be the single most efficient solving of a software problem I’ve experienced in decades of software frustration.
It’s an issue I’ve had for ages now and I’ve thus far just gone: ah, forget it, I’ll just use the albedo as a bump. Game-changing! Many thanks!!
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I feel your pain. I spent a good couple of weeks trying to troubleshoot the normalmap issues I kept having in Blender before finally happening across the solution in some random video that mentioned setting the image to non-color as an aside. I’ve since made it my life’s quest to help others with this same problem.
As an extra bonus, I’ll add that you should also be doing this with all your various PBR channel textures, outside of anything that plugs into the diffuse. It’ll help make your models match the way they look in other programs.