Here are all the images we used for the environment concept art
The thumbnails that usually start small, we got 4 different ones
Thumbnail1
Thumbnail2
Thumbnail3
Thumbnail4
And the Sketches, that offer a little more refined concept of a certain thumbnail, in this case we picked thumbnail 1 and thumbnail 4
Thumbnail1 - Sketch1
Thumbnail1 - Sketch2
Thumbnail4 - Sketch1
Thumbnail4 - Sketch2