Just thought I'd share them as I found the cool-looking:
They're really old (think they're from back before they decided on how the game should look - their date says 2014), they were made by a artist called Jurgen Miersch - I don't think he made anything else for the game.Where are the maps from, who made them, why do they exist and why are they not part of the game?
Well I guess that explains it (they do look cool though)This level of detail would completely break the game performance and would also exclude a lot of devices from running the game. These are high-res concepts from a long time ago. Maps are now generated with an editor using all available in-game assets. The game designers basically create them and can test them in real time as they do so.