In addition to the other amazing drawing tools (shapes, pen, pencil, lines), Illustrator provides lots of different brush tools.
Most of Illustrator’s brushes are what we describe as path brushes; they draw vector paths to which you can assign different brush effects. These include Calligraphic Brushes, Scatter Brushes, Art Brushes, Bristle Brushes, and Pattern Brushes. If you want to change a brush effect, just select the path and choose another effect. This chapter discusses the most commonly used ones.
The Blob brush, however, doesn’t create a path like the other brushes; it draws brush shapes that are filled with color. This brush has some unique characteristics that make it a particularly powerful and fun tool to use.