Although most people don’t think of GIMP when they think about digital illustration software, it’s a surprisingly powerful tool for colorizing or personalizing images—or even creating original artwork from scratch. In this chapter, we’ll show you how to add color to a drawing and give you an insider’s look at how digital painting is done. We introduce a few basic tools and techniques, including paintbrushes, fill tools, and methods you can use in GIMP to draw simple shapes.