You're using solid colours for wood elsewhere, does that not look good enough for the wooden panelling?
The scene feels very open/spacious, which isn't what I tend to associate with submarines. The details are well-done and interesting to look at, but the overall layout of the place feels a little boring and drags the scene down. It's also all very regular and tidy, there's no sense of organic use or messiness/convenience. Will the player be walking around here, or is it more of a menu? If there's no collision to worry about, or if you can have collision that doesn't follow a grid, consider not having all the tables being parallel, have them at odd angles, perhaps curving around the exterior shape.