The model is Organodron City by Herminio Nieves (free at free3d.com/3d-model/) with adapted materials from the 50 Metals The Heating Room Set (*). The moons are spheres with my own textures. Sky and ambient light by the Ermclouds08_SD HDRI from the Inclement Weather set (*), the key light by the sun. (*: available at Daz 3D). An offshore research centre.