When Josh Sawyer (Obsidian Entertainment) was streaming BG3 last year, he mentioned that WOTC is very particular when it comes to costume design in the games matching the art style of the current edition.
I.e. in NWN2, they were basically forced to follow the fashion rules of 3.5E. One particularly interesting rule was the requirement that all outfits be asymmetrical in some way - from the alignments of a simple belt-strap, to the pauldrons of armor, it just couldn't be symmetrical. Never really noticed it until he pointed it out.
With that said, I'm sure there's room to play within these restrictions. I'm curious as to what the core tenants of fashion 5E are.
