@sivan
That is a good idea. But I think I will use those bulb lamps in the apartements of this hallway. For the hallway I might use something like this lamp.

@lemming & JibbSmart
I think the reflection is fine now. It is also slightly distorted,
so I think blurring it would not change that much (but I guess I will look into it).
It actually looks better in realtime than in the screenshots.
But I will add some decals for the ground as I did for the walls.

@gri
Now I get your point and it makes perfect sense
I will add doorframes and make bigger walls so the creatures
of hell will survive.