Leonardo,
The guy is great! I'm sorry I don't recognize him. anyway, I presumably you have a release?
The clouds are cleanly rendered. I wonder if you have enough. I gues one might omly want one cloud. Still, I'd try and get a set of complete clouds. Also I 'd perhaps even out the gradient across the blue sky. I haven't looked as to what is available, but I'd like that done for me already if I'm buying a stock cloud!
Fine work!
Asher