looks, nice, i get a slow down at about 900 boxes.

one thing to mention, (other than the close up artifacts, which heelx already brought up) is that it ssao seems really weak, like almost like its not even there. i'd darken its effect a little. also ive noticed, it seems like your shadows are not just darkening, but also oversaturating your levels and it makes some very ugly colors in the shadows.

other than that its some beautiful work