I have a tree from blender with auto smooth, and same tree mesh with simple flat shading.
After imported to UE5, I give them same material with a constant normal input, they sure look different. All I know is that auto smoothed tree has some extra data called split normal, which flat shading tree doesn’t have. I want to know exact how this split normal affect the result even they have same constant normal input.(I thgouht that constant input normal will override everything like this auto smooth stuff like it was in blender)