I've worked on this a few months ago during a 10 day GameJam hosted by GameDevTV
This is a short video of the environment created and the level-design/layout.
I was in charge for the Art-Aspect and also did the Layout in the end and the general design of the level.
We also have a Shader Ingame because the Game has 2 different Dimensions. One normal Dimension and one Monster Dimension and you can switch between those via the Portal seen.
In the Game a Monster is hunting you throughout this Mansion. The only way you can see it is if you switch to the Monster Dimension. You also collect parts for a Gun which you can use then to kill the Monster. Since we only had 10 days and I did all the Art stuff in the end it's not super fancy but I'm super happy with the outcome since it was also my first time using UE5 for a bigger Project.