I still wouldn't advise you to replicate other cg work, or even take it as reference for that matter, as your goal is lower than it could be right from the begining - whether it is to work on post-prod skills, materials, lighting or composition...
We have one of the best architecture photographers, copy him instead ;)
Regarding post-prod, know first what the image needs, and only then find whatever tool to achieve it. Even a simple curves correction can do wonders, because it's not about technique as much as it is about sensibility.
I personaly enjoy looking for video color-grading breakdowns, helps to understand the possibilities.
Hope it helps.