I made this scene two years ago. Just before the… Well, you know. It was quite a challenge that required the use of a variety of techniques to create all of the different objects and bring it all together. Everything was modeled in Blender and rendered in Cycles. Many of the materials are hand painted in Krita or procedurally generated within Blender. Blender Nation even published a behind the scenes article about it. You can check out a bunch of the individual assets on Artstation too!