I had the pleasure to provide the base layout for Quarry. I build the initial blockout using external tools before the map was brought it to life in Diabotical's in-game map editor by PromEUs who took ownership of iteration and art.
Check out Promeus's content here: https://twitter.com/Eml_Jhn?s=20
*Screenshots shown here are during various stages of development and do not represent the final product*