Balloon Over Houses, Vic, Catalonia

Everything here is authentic, the houses surrounding a square in Vic, the balloon promoting a travel agency...except for the skies who were in fact quite gray and dull. I had to add some graduated blue effect (nik Color Efex Pro 2.0), some pink near the balloon and still they don't look very convincing. I do like the roofs and the brief appearance of the basket between the walls though.