I'd written ebuild files for painting tools "AzPainter" and "AzDrawing"
and pushed to my GitHub's wjn-overlay repo.
AzPainter and AzDrawing were popular painting tools between Japanese amateur artists.
It was for MS-Windows, but moved to GNU/Linux recently, most users were ended up to use it.
But, for GNU/Linux users that is a nice news. Because GNU/Linux has no similar software, I think.
They are for Japanese pop art, Manga or Japanimation style.
In fact. For MS-Windows, Though there are Photoshop, some other painting softs are sold in Japan.
They are much lighter than GIMP, and support pen-tablets.