Assimp as the name states is thn open asset importer. It's a library that supports almost every 3D asset file format. Many applications like game engines, model viewers, games, etc use it, not to mention it's useful for developers of such applications inside of funtoo. Unfortunately we are using a static ebuild for it that is 1 major release behind upstream.

I made a simple yaml autogen for it so that we can have it up to date

As an added bonus I use this every day for software development(though I vendor by latest commit myself) so I can offer full support for any breakages of this in the future