This brush was designed for shading with opacity and is ideal for use with darker colors applied over your base color. It simulates a smooth multiply effect or layering effect by using reduced opacity with your brush strokes.
Remember that you can adjust the opacity of the brush to achieve better effects depending on your artwork.
Below I made some examples using this brush for shading:
![](http://assets.clip-studio.com/en-us/description/2008685/img/578e210d8a-7848-0b8b-450b-6df8320c21.png)