Thanks, I'll think about that. For some time now I think I should add some other colours, right now there's lots of similar colours in all these pictures, green, blue, brown... I'm sarting to grow tired of those. I need different colours to diversify a bit, like the red in the one picture (vertical, buildings with clouds). At the same time I think I also need to establish some coherence in post-processing... Well, these things are not easy, but I think crucial for a series to be succesful. But you know this yourself. ;-)