Let me introduce Sunprint Brushes! It's an absolutely lovely stamps with slightly blurry wet edges to imitate sunprint artistic technique. 5 silhouettes for Procreate App and Photoshop! And they are pressure-sensitive with stylus or Apple Pencil (opacity depends of pressure you apply).
It's a small part of huge Sunprint brush pack: https://designbundles.net/olgarom/1353404-sunprint-brushes-for-procreate-and-photoshop
So happy designing!