This is my recent personal environment work.
I used Maya to make sci-fi military base and Houdini to create cliff generation and scattering trees.
For texturing, I used substance designer.
Adrien Lambert's tutorial of Houdini is really helpful for me.
https://www.artstation.com/adrienlambert
https://adrienlambert.gumroad.com/l/pYaGH
I also used really nice hardsurface kitbash asset from Voloshenko.
https://www.artstation.com/voloshenko/store
I hope you like it!
Thanks!