The pi 3 handles enhanced rez just fine when the environments aren’t too big. I was messing with it yesterday and games with small environments like Tekken 3 and Crash Bandicoot 2 look better and run perfect. But when I was in a large environment in Tomb Raider 3 that already made the frame rate dip without enhanced rez it only got worse.
TR3 was always kind of a mess though.