Hi Guys
We do mainly VR dev for Archviz. Our preferred platform for bringing in structures (and you can laugh if you want) is Sketchup. We can bring in a full house with all walls, windows, doors etc as one Mesh. For quick VR walkthroughs it works great. We use one mesh and one movable directional light, with a post process volume. The results are pretty amazing. With baked light, Sketchup is a winner for structures of a building. For decor, you can forget Sketchup of course. We do use a specific modelling method in SketchUp to ensure the UE4 generated lightmaps do not create leaks or inconsistencies. We only use generated lightmaps. But this is of course an Archviz pipe.
Just some insights.
Cheers.