How do you model your scenes?

Hello there. I’m posting this poll as I’m really curious of how do you aproach the modelling of a several room scene.

I can only think of four posibilities: make some few modular assets (which will surely result in lighting issues), making a model for each wall/floor/ceiling of each room (which will mean a ton of models to keep track of), do a separate model of each room or do a model of the whole scene (both of them mean you’ll have to fiddle a lot with collision)

So, what’s your personal choice?