How many photographs do you think were used in the composition? I believe that there was probably about 20 different pictures of different sections,times and lightings of the same picture when it was clearly composed into one picture.

Were all of the photos taken at the same time of day?I think the pictures were taken maybe on the same day at different times due to the lighting of each photo some of the photos seem darker then others or more dull.

Are there any obvious post-processing (Photoshop) enhancements?i think there seems to be a filter on the whole image other then that no.