what are the render times looking like?
Absolutely terrible :- ) The discrepancy between both fast scenes and slow scene of ours is 10x ? These take hours in high-res, on many dual-xeons.
I am not sure what it is.. but most of it comes from GI. Even in scenes where windows are quite big, if there is enough bouncing possible, times are endless.
I am trying portals in many ways but it never seem to do anything, or anything I can notice.
Also..I am not sure if the adaptivity is working correctly in these cases I need to check sample pass. Smooth surfaces (walls and ceiling) almost never clean-up like they are being ignored. I clean them sometimes manually by region-ing (moving around).
Some of it can be attributed to classic scene complexity build-up over the years. Everything is high-res, has tiny bumps, and everything is fully specular (all mats are PBR). Still,...the interiors take forever...like forever :- ).
I do not mind terribly...for stills it's ok. But I would love to do more animations and it's kinda impossible with these space. Maybe I'll just do animations with Unreal only.