Comment by RGamma

I was gonna say this as well. The videogame community has several fantastically talented people in it, creating /tons/ of stuff as a hobby.

Just look at all the mods and assets available on e.g. Steam marketplace or Mod DB, some of them entire games like Black Mesa: Source or Enderal. There already exist reskins of videogames (like the various Minecraft texture mods) and graphical improvement mods (like GTA V's "NaturalVision Remastered") some of which is done without any sort of official API.

(One would probably call this https://en.wikipedia.org/wiki/Fan_labor, but I strongly dislike the term due to its association with big$ milking fans.)

Given some thought about a general framework for this the ability to reskin might be a nice thing to have.