I think I got it. I entered “t.MaxFPS [int]” in the console command line and that made a substantial difference… Of course, it’s still suboptimal. There’s nothing like this problem with Unity Pro. But in the long run I don’t want to use Unity Pro; I want to use UE… I concede that UE might be doing something more than Unity Pro in the background that the experts would appreciate. If so I’d like to know what that is so that I can continue with UE (if only with blind trust presently).