normal maps on that white panel walls look inverted, could look better if you flipped them.
yeah, actually not inverted but that normal map gives a weird result. I've generated a new normal map from the diffuse texture and I think it looks better now:
3D Gamestudio A8 Pro AMD FX 8350 4.00 Ghz 16GB RAM Gigabyte GeForce GTX 960 4GB