Originally Posted by stevejarman
Can you elaborate on this a little more? Genuinely interested in that sort of feedback.
Sorry, just saw this. Not sure it's simple to put a finger on exactly what makes an environment feel natural and believable as opposed to contrived. I think resisting the urge to symmetrise is a part of it. Adding detail is another. I also noticed the environment looking very "clean" throughout, as if a team of housekeepers just finished their job.
On a deeper level, I think what really helps is having some sort of background story or lore behind your creation. Even if the player is never made aware of it and it is solely for the purpose of providing a reference for yourself: what is this place you're building? How long has it been here? What was its original purpose and how did it evolve over time? It might be deserted now, or populated with monsters, but has it always been this way? What is the logic behind its construction? Why are the exits placed where they are placed? What used to be the function of this floor? Why was this floor designed with narrow corridors while this one has a wide open hall?
Lore and purpose would dictate how an environment is populated and (ideally) create a logic that the player can sense which assists immersion.