My Watercolor brush engine allows digital artists to use watercolor technique in realtime, like in real life. It uses algorithm of dynamic polygons which disribed in the article of the IEEE members: Stephen DiVerdi, Aravind Krishnaswamy, Radomı́r Měcn and Daici Ito, written in 2013.
Phabricator task. Also contains commits list
In the process, problems arose with the drawing system in Krita. Because of this, at the moment there is no complete undo system. It works only after switching another brush engine or tool and it undo all paints.