5K reference photos, that is next level bro ? It is gonna definitly help you later with detailing. The visual aspect of this map has great potencial, just don't get caried away with it and focus on the layout of the map in deph first and I think that you can create very strong entry into this competition, as well as great map outside of this competition.
I am definitly excited about the future of this map and I will keep an eye on it.