FBX workflow for more complex objects

Hi All,

So i’m new to this and trying to use UE for ArchViz. I made my model in SketchUp and applied basic materials. I imported as a combined mesh so I could easily apply UE4 materials (eg apply UE4 to a floor of my building, all floors become wood.) When I build the lighting it was not happy. Is this because it is too complex a shape to map UVs? I tried importing as non-combined mesh and I have 1000’s of small meshes. I brought them into the level together but now applying materials will take days!

What is the best way to get this complex building into the engine without sacrificing the ease to mass apply materials?

(Also what is wrong with my point lights?)

Thanks in advance!