Some features described in the Help are available only in Corel Painter 2020, and are not included in Painter Essentials 7. For more information about Corel Painter 2020, visit http://www.painterartist.com/. To get started with Painter Essentials 7, see the Painter Essentials 7 Quick Start Guide.
F-X brush variants can give you an array of creative results. Some add color; others affect underlying pixels. The best way to appreciate the F-X brush variants is to experiment with them on an image and a blank canvas.