You can download the Grass & Fields expansion pack here: https://tamberella.gumroad.com/l/grass2
You can find my other brush packs, including the original Grass and Foliage set, in my Gumroad store here: https://tamberella.gumroad.com/
The intro video for Procreate is here: https://youtu.be/8hPZgShepf8
The intro video for Photoshop is here: https://youtu.be/cOP6hiQhbxY
The intro video for Clip Studio Paint is here: https://youtu.be/fqORWTVEPAA