@ Erick_Castro:

A video taken of the level from which the images can be found here:
http://www.youtube.com/watch?v=4_B5atNa5cw

@ MPQ:

Ok, I'll work on the lighting yet. Basically, I'm quite satisfied with the result. The idea of invisible blocks to give the models I like. I try out with the next room.

Gruß, Andreas