My latest Photoshop oil paintbrush ‘Mount relief‘ is probably the loosest of the oil brushes (although you could say that it’s more of an acrylic) I love painting with it as it is very expressive and has a very controllable flow from rough and scratchy to a rich fill depending on how hard you press.
As often on brush release day, today’s free Photoshop brush (today only – 09/06) Get it here: https://www.grutbrushes.com/shop/photoshop-brushes/mount-relief-photoshop-oil-brush/
After that it will be available as a single paid download and also as part of the all Photoshop brushes package.