What we have here is a gigantic ancient terraforming structure. Could be a leftover by some ancient alien civilization. It’s still working, but has a limited radius and that is why there is only a developed ecosystem in close proximity of the structure. I’m not entirely happy with the end result but it’s cool enough for some inspiration I think. Hope you guys like it. :)
Part of The Luminarium Artgroup/Collective and its 27th exhibit with the topic ‘Organics’ - http://theluminarium.net/v3/exhibits.php?id=28
Below you can find 100% zoom quality caps, the starting plate and an alternative colour version of the scene.