Well this is something that I have been working on for quite some time, mainly for me to keep my sanity between school assignments. 
There is also a lot of small details on the back mountains that are hidden behind the buildings in front so you can move the back mountains, say in an animation, and it would show more of those details. (if that makes any sense at all) 

Yeah the .PNG is a little large so if you need a different size and can change it yourself let me know and i'll send you a smaller or larger .PNG

AI File: sta.sh/09kpyxt42ns

MLP (C) Hasbro