I've found out that there is a huge demand for talent in creating outdoor scenes so I figured I'd learn that. This is a simple proof of concept that creating detailed outdoor scenes is possible with Blender. I'm currently also learning Octane to get better-quality renders of my other projects.
Besides that, this has been a great opportunity for me to learn how to add realistic film grain and some other post-processing effects to my renders.

Viewport display.

Screenshot from Blender showing how the scene optimisation works.