As usual I gathered tons of reference images of robots, heavy duty machinery, engine pictures etc. I tried to understand how such a machine might look. I was inventing and changing things during modeling. Then I moved on to painting the textures and fine-tuning the shaders. I moved closer and closer the final model with every new detail I added and every test render (Fig.06).
When I was completely satisfied with that model, I started to think about the environment (Fig.07).