Something I've noticed is that despite the smoothing being exported correctly as seen in the noesis screen snip below -UnrealEd just ignores it and makes it's own smoothing for the model.ActorX has an option that might be relevant to this issue - baking the smoothing groups when exporting. It basically splits the model along sharp edges (with the obvious drawback being more verts).https://docs.unrealengine.com/udk/Two/ActorXMaxTutorial.html#Bake%20Smoothing%20Groups
Edit: Only lights show off the smoothing (and the camera doesn't factor into it)
Something I've noticed is that despite the smoothing being exported correctly as seen in the noesis screen snip below -UnrealEd just ignores it and makes it's own smoothing for the model.ActorX has an option that might be relevant to this issue - baking the smoothing groups when exporting. It basically splits the model along sharp edges (with the obvious drawback being more verts).https://docs.unrealengine.com/udk/Two/ActorXMaxTutorial.html#Bake%20Smoothing%20GroupsEdit: Only lights show off the smoothing (and the camera doesn't factor into it)