Thank you very much for the nice detailed comment and the implicit ideas, Marcio!
I already think about allowing more of the steps and their shadows appear on the image. A very interesting idea, actually, but it means that I must find another angle that keeps the two beads on image.
The two spheres, the beads, are differently colored... because they are differently colored. Nobody of the municipal authorities cares aboout a permanent uniform coloring of the two - it is simply... ompossible and also irrelevant. Why should they be colored the same way? Rain, snow and time do their work. That's all.
Hard work, but you did well Nick. I think you got your goal .. beads and walls are well defined .. I like a lot of harsh shadows on the stairs talking to the shadows left the floor (you could exploit more) I just have a doubt with the colors of beads, one more yellowish tone than the other.. You know why?
0 
