Concerning worthless pieces of space junk, its the junk that lies around in the makers workshop that can tell us how he did it. (Thats a metaphor, not a religious statement)
Interestingly, in archäologyits the same, it´s the waste that tells us most about living conditions in the past. What will they think of us in the future?
Yes, rendertime was quick.
All in all about one hour from the idea to the finished render.