Using Smartify Nodes to speed up enviro design / concept art:
https://blendermarket.com/products/smartify-nodes
https://www.artstation.com/a/29976192
https://liok.gumroad.com/l/ibdndk
Sci-fi Models are from Kitbash3D sample kits.
Rocks blender / sketchfab, with smartify materials/effects.