Are you planning on releasing the UE4 project to the public? Or only builds? I'd love to play around with it in the editor if possible!
Please make the second floor..!! and if you've done it please tell me where can I find it...??!
Andrew Price has shared a Blender tutorial on creating a subway in 20 minutes. This not a step-by-step guide, but rather a set of tips and tricks to help you figure out your own workflow.
I heard that trying to copy a reference photo is one of the best learning exercises, and valuable things to have in your portfolio. I found this reference on Pinterest and decided to copy it using Blender, rendered in Cycles.
All materials are from Poliigon, but the walls and ceiling stucco I made myself using Substance Designer.
Here are some more final and WIP shots: