In my first unreal project, I created a small house that has several stuffs in it.
Here is what I have done in this project.
I put an atmospheric fog in the scenery, that makes the sky to be translucent. I also put a derectional light enable it to be bright.
The room has three walls and I changed the material of the wall. There are also table and chair in the room, and a lamp light the room. You can see a ball over the table. The ball has gravity, when you start the game.
Here is the link of my project
https://drive.google.com/drive/folders/0B73laoznmpaVanJFeTk3S0N1VWc?usp=sharing