Thanks guys for commenting,
@SurfingAlien: Well, this is not a project which will be realised, it will mainly be used for advertising I think. The idea is to exploit existing and reconverted industrial places, only the central bloc with the metal structure is supposed to be existing. I had some liberty here and I probably exagerated the front concrete bloc which is probably hard to be auto supported
The interior view give an idea of the base existing environment and of the metal structure : viewtopic.php?f=5&t=3226
Here are also some additional information, the textures are home made or grabbed on CGTextures site which provides really great textures, I usually transform them to make them tileable and to have bump and spec maps. All the trees are home made using various scripts and tools.