Okay so I have a very weird problem
At present this is what my hallway looks like with no spotlights enabled in the level.
When I enable spotlights in a room on the other end of the residence (completely separate and mostly enclosed), the hallway gets darker.
If I increase the intensity of those spotlights (from 30 to 100), it gets even more dark:
If I turn all the spotlights in my various rooms on, the hallway gets way way more darker and introduces artefacts and blotchiness.
At first I thought somehow the lights in my rooms were interacting with the hallway but that’s not the case. I added two random spotlights at the edge of my map, pointed them out into empty space away from the model and…
Hallway gets darker still.
Is this some kind of bug? It’s been such a frustrating problem. All spotlights are static and simulate downlights so cast shadows are on and inverse square falloff is enabled.