Here is a concept sketch that I did for David Weinstein [link]
for his Sci-Fi short 'Azureus Rising' (it's no longer called Dark Elephant).
This one is an unused piece (due to changes in story) so I can publish it here now
You can see a first WIP shot on the left that I revised upon request in order to make it even gloomier and darker.
2 hours or so, no direct ref. some mayang.com textures and my own