A while back last year I set out to create my first 3D environment inside Unreal Engine 4 and finally got around to rendering and organizing everything for presentation :)
My goal was to use as few unique textures as I could. 90% of the objects in the scene are low-mid poly models using tiling textures. The only exceptions are the doorway, the stairs, and the stone pedestal since I wanted those to be my unique objects in the scene. I created all the models inside of Blender and the textures inside of Substance Designer and Painter.
I used Polygon Academy's lighting presets and edited the settings to get more saturated and dramatic colors/contrast. I also used some free fire particle systems from the UE4 marketplace for the torches, fireplace, and candle lights