Modified dry brush
Instead of horizontal or vertical dry brush strokes you can use a more curved stroke using the body of the brush head, which just lightly touches the watercolor paper.
The trick to this technique is to have your brush almost parallel to your watercolor paper, and not to let the point of the brush touch the paper either.
I use this technique when creating the impression of tree foliage for gum trees and other similar trees as in figure 8. I also use this brush stroke when doing skies with fluffy clouds.
The trick of making this work is not to dab at your paintings but to lightly move the brush over its textured surface. It works best with rough paper, but can also be applied to cold pressed paper; the smoother the paper the less paint you want in your brush to create the broken edge effect.
Watercolor Brushes Used
As I mentioned at the beginning of this article, these edges in these examples are produced with a round brush. They can however be produced with other brushes, some easier and others more difficult depending on the brush used.
As you master these edges you will find painting water color art will become much easier and they will give you the tools to make some wonderful watercolor paintings.
I hope these watercolor painting tips have been of use to you.