2. At 100px, pull out the datum line vertically and horizontally, as shown in the figure.

3. Draw a path on the reference with a pen, as shown in the figure.

4. Adjust the brush size to 6px and use a black soft-edged brush.

5. Point to the pen tool and create a new layer, as shown in the figure, right click and stroke the path.

6 copy this new layer, ctrl+t, right-click as shown in the figure.

7.crtl+e merge these two layers, copy this layer in situ, ctrl+t, press shift+alt at the same time, shrink this layer moderately and rotate it by 45 degrees, and ctrl+e merge these two layers, and adjust it to the appropriate size under the center point of the layer with a soft-edged brush, and the production is completed.

8. Define the brush as shown.

In this way, our new brush is defined.