I've been working on these renders for about a year, basically since lockdown started. I started this project to stay sane since we stay home now as much as possible. I chose this long project to tell a story about a character, Arissa, having a long journey to find a time machine so she can go to the past when world was in much better state. I wrote a blog about it, you can read more about it here.
https://www.mostafaakbaridesign.com/blog/2021/04/06/creating-my-longest-3d-project/