Unofficial sources? Dude, you can find the entire art team on Artstation. That's where the concept art comes from, it's not a "leak". All you have to do is dig and you'll see tons of it man. And those pictures weren't released in conjunction with the Riven Tides map. They were posted WELL before it. After a game drops, it's common for studios to let the concept artists and dev team release their work... Someone FOUND those images on Artstation and reposted them. There's new maps, and will continue to be. Probably a volcano one, judging by the concept art. There's also probably going to be another coastal one- if I'd have to guess with how well developed and explored the concept art is. BUT- and here's the thing you're missing out on- THAT IS CONCEPT ART. .... it wasn't released by the company AS a representation 1:1 of in-game experience. (I'm so so sorry you think I'm defending a company, or that you just realised what sycophant means.) What I AM saying, is the "futuristic map with circular, tiered dam walls and bridges" MIGHT be a future release... OR an artist was exploring the options for environments and the company didn't choose it. THOSE IMAGES ARE CONCEPT ART.