Did this on site during a gorgeous afternoon just after a rain storm had passed through.
The sky was incredible but changing so quickly!
After I had everything laid in I started on the tree and foreground. Suddenly, another rain impulse started pushing through and so I quickly dashed in the outline of the city and blew out of there. Irony being what it is, as I look back at this I realize that by rushing through the final bits I actually avoided putting in too much detail in the distance.