This little project is, well, mind blowing to me 😀 It is made by Mike Sneath. Clicking is name will lead you to his webpage
There is the Epic thread. From him : The goal for this project was to learn as much as possible about Unreal/Epic Production with a single project. This room demonstrates or makes use of the following: Baked Lighting – Animated Lights – Post Effect Volume – Modular Construction – Decals – Complex Shader Creation – Particle Creation – Simple Animation with Kismet – Painting of high fidelity textures – High Poly Modeling. Nearly everything in this scene is based on the power of two modular building methods.