Mesh shading bugs after exporting from blender

I keep getting these shading errors on meshes export from blender.

I even tried importing a vanilla mesh and exporting it withou changes just to see if it still happens. It does, meaning its not caused by mesh geometry or any changes i make to it. Its not caused by edge split of auto smooth either. The errors also only show up ingame, in blender it shades perfectly fine.

The only way i got the errors to go away is by exporting the mesh as shaded flat, which doesn't help much.


Any ideas?

 

Which part is the error on I cant tell where to look lol

 

Try recalculating the normals on the outside of the mesh, it likely isn't the solution but it's always worth a shot.