This feels like arguing semantics. but sure. The epic team isn’t completely asleep at the wheel - I hope but the forums would prove me wrong… So there’s about a snowball’s chance in hell.
LPV doesn’t like thin objects either… any Volume doesn’t like thin stuff.
My modular walls that seem to work have a minimum thickness of 10cm - but default resolution scale for the DF.
Either way, it’s not “impossible” to do a good job within the engine confines just because we don’t have a fully functional and all encompassing CORRECT gi.
there’s literally tons of UE4 games that are “only interior” and do a great job at things - including performance (many are given off as freebies by epic, I think Close To The Sun was)
I think the one I have to praise the most so far was Outerworlds (definitely wasn’t a freebie).
The common trend is that they are all super cartoony compared to other titles.
Hellblade: Senua’s Sacrifice
is probably the only current example of a well made - top graphics - decent performance - Realistic (at times) looking game.
So crazy good looking things that run in older engine version are possible. it’s just about how much time and effort you put into it (and team size/skills).