>>42540861
Canterlot does have some good night backgrounds.
Streets and places:
https://derpibooru.org/images/3156456
https://derpibooru.org/images/274672
Royal Garden:
https://derpibooru.org/images/2678896
https://derpibooru.org/images/2678872
https://derpibooru.org/images/582943
Throne room shouldn't be a problem.
The only one that does need a retouch is the airship harbor.
>>42540904
Here.