Agree with Kwauhn, some color on those doors would make them more interesting. First thing that came to mind as an example are the ones in Left 4 Dead:
Hey everyone! My team, Torch Games, is creating a stealth game in UE4. Here are some examples of our 3D models. Any suggestions? Feedback? Critique? Our doors are open for new ideas :) Also, check out our facebook page for more stuff: https://www.facebook.com/torchgamesstudio