Blender normals looks worng after inport to ue4


I duplicated and rotated this box at first.
The original one is fine.


But import in ue4 looks bad.


I recalculated normals but it does nothing.
So I try flipping the normals.


But it looks right.
That confused me.

When you are importing the fbx from blender, are you allowing UE4 to compute the normals, and using the Mikk TSpace method? That is how I import the fbx, and have not ran into a problem with normals, as well as this way fixes a few other issues.

Hope this helps,

It not worked,but I find if you scale it to rotate something in Blender may cause the problem.