Issue with baked normal maps on triangulated geometry

[Aleksi_Kortesalmi]

I’m having problems with a baked normal map creating hard edges and other abnormalities. I have a single directional light and I’m using the GLTF loader without making any changes to the materials.

What could be the cause for this?

Threejs:

The baked normal map:

Blender material preview and export settings:

*Also works great in Unity (reached image limit)

[Aleksi_Kortesalmi]

Fix/Workaround

I found that removing normals from export and using an object-space normal map works perfectly in my case.