Hi,
as many of you know, from UE 5.4 onward, Interchange has replaced the legacy FBX plugin by default, so when you try to import FBX - the most common 3D mesh import format, you will be met with the new Interchange importer.
If you are importing Static Mesh asset, it will default to the “Asset” template.
BEWARE that the out of the box Asset template defaults to “Recompute Normals”:
This literally means that the importer will completely throw away normal smoothing setup done in the DCC and will use trivial angle based heuristic to completely recreate the normal shading. So you will most likely have wrong normals on any meshes you’ve imported since you started using interchange, unless you noticed this wrong default and turned it off.