Lighting does a lot to improve a scene, but unfortunately I'm almost certain that it's pre-rendered lighting, which isn't all that interesting since any dynamic objects present ruin the effect.
> is that video was rendered real time?
> Yep (well, the lightmaps are pre rendered but it take like 10 min. In engine, it runs at 50-60fps on a gtx670)
[1] https://forums.unrealengine.com/showthread.php?28163-ArchViz...