An article I did for 80 Level, where I discuss the various approaches I've used in organizing and building environments for games, both for my personal work as well as professionally. I talk about how that workflow has progressed throughout the years, as processes become more refined and efficient. I also share some personal insight about my career at Ubisoft, teaching game art, and mentoring.
You can view the article here:
Since writing the article, I've added some additional breakdowns on my blog. Have a look if you're interested in a more detailed explanation of some of the workflows.