Is this real or is it CGI?
It’s a computer generated image. The program I use as a render engine is called Bryce7. Scenes like this is what it was originally created to do. I bored of landscapes quickly and started using the Primitives that came with the program.
I started out by making buildings and a few futuristic cities and such. And then it eventually turned to Machines and mechanical Surrealism which I still do now.