Aerograph

This script reproduces the airbrush painting effect.

1. Select the proper layer in the Layers palette.
2. In the Effects panel, double-click the the "Aerograph" thumbnail.
3. In the "Gaussian Blur" dialog that opens, adjust the "spraying" result with the "Radius" slider (screenshot).
4. Afterwards you will be able to edit the effect with the help of the "Smart Filters" tool.