Have you ever had trouble finishing and/or retouching your portrait painting? I did and I made this brush pack to make the polishing phase much easier and faster. All of them have specific options to adapt the single brush to your work, so I highly reccoment to play with every option. I highly reccomend to use this brush set with the use of the "running color on fiber" basic blender (in CSP) at 50% brush density.

Guide for importing brushes in the program: https://www.learncsp.com/add-brushes/