Sorry. 
That situation sucks: the new reflection system is great for many things, but not for simple mirrors… And they had a system that worked perfectly in UDK, I don’t understand why they removed it in UE4.
Sorry. That situation sucks: the new reflection system is great for many things, but not for simple mirrors… And they had a system that worked perfectly in UDK, I don’t understand why they removed it in UE4.