Wow taron, that looks convincing but bwwd brush is exactly what he was looking for, wasn't it?
Recording image brushes is sometimes better to turn off canvas, as you may double the effect later when painting again.
If your brush is fully opaque and you turn off transparency while drawing with the image brush, it will paint fully opaque.
I didn't do that in my example. It seems that you know that already, but maybe others are interested in the solution.

Fluids and image brushes are a different story. I guess that the fluids are taken the motion vectors of this rotated and oscillated brushes.
It looks like they are thrown into the fluid and reacting a bit like that (Would be cool if they would really, adjustable splat btw.). Therefore just a minimum of fluid can make the edges unsharp.
Bwwd - I bet you like "Ori and the blind forest" aren't you

Finally I must say that both brushes are looking crazy cool.
Thank you guys!
HOLD!!!!! What have you done there taron!!!! Can I do this too with my verve version???? Where can I download

Hahaha, spelling the plural of leaf is a bit tricky. I have my leafs brush in my leaves folder i.e.

, as I am uncertain. Leaves should be the most common form but leafs is not completely wrong is what the internet teaches me.