Thanks to you both.

ExCiter is right. I can add some dirt layers. But that can be done later on. Maybe SF will do that (he is a master in turning clean textures into dirty ones ).

DaBro0zar: I do my best. Maybe end of the week I have a set of 50 textures. But then I want to create a test level to see if something is missing. We still need doors, cables, pipes and other stuff to make it more detailed.

And I want to create a tutorial for the beginners to help creating contents with this set of textures.

But if you need something very fast then just PM me.