So I love using new tools in my creative process. I have learned a bit of Blender it's a really powerful too for a 2D concept artist. You can use it to make some really cool environment pieces. Here is the sped up video process:
I used the following kit to kitbash the structures in the scene, check them out, they are free!
https://gumroad.com/adrianrutkowski#
Here is the model base I painted over:
Here is the final image:
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