It’s a bit strange having this featured after 3+ years! 
I’m okay with you posting it on Mastodon as long as it has context. Well - I suppose the title is self explanatory anyway… 
The clone brush painting isn’t something I’ve used very often - I can only think of this painting and its sequel outside of test scribbles.
I’m still hoping we’ll get the clone - colour smudge - lightness functionality we’ve discussed before. It’s one way we could achieve a dirty brush effect with existing engines.