Hi, Because I was making the Unreal for cartoon rendering, I needed to smooth out the normal direction of the characters’ hair. I used the NormalEdit modifier in blender to smooth out the normal direction.
.
Everything seemed normal in blender, but after importing it into the Unreal and applying the Lambert material, the model showed uneven coloring in the Unreal.
.
Then, take a close look at VertexNormalWS. Its normal is not smooth. Why is that? Is it because it still reads the normal of the face corner normal?
.
I exported the model from Unreal back to blender and reproduced the Lambert material, and there were no issues at all
