The project is based on a background of the movie “The Iron Giant”. The image was painted by artist Joel Parod in his training of backgrounds with traditional painting in Warner Brothers. With that movie, Brad Bird debuted as a director in 1999 and part of the movie was made on a computer. Last year was the movie 20th anniversary, I had the opportunity to see the book “The Art of the Iron Giant” and found this image, deciding to make a 3D version. If you are really interested you can download the clay render for free.
Workflow Video: https://www.youtube.com/watch?v=xS7q54ge_Js
Behind the Scenes: https://www.blendernation.com/2020/04/01/behind-the-scenes-the-iron-giant-background/
Topology (not the best)