This kind og visualization is great. I see so mane 100% clean renderings, and Iin the real world, things aren't so clean.
I love this picture, because this is a place where you can see once were nice.
Only I think the white stones could be more realistic - maybe you use a little too much bump - or the tiling between the texture and bumpmap are different.
Thanks Michael, for the good advice. Ill post some other shots, and hopefully i can finish my animation..^_^
Cheers