I have posted a bounty to get MyPaint brushes integrated into OpenToonz.
I would appreciate if you help to spread a word about it. Maybe someone will want to join me and pitch the reward amount. In this case there are higher chances to get some developer interested to implement this. ^__^
https://www.bountysource.com/issues/34932107-feature-libmypaint-for-brush-tool-in-raster-levels