In this chapter, we will learn how to render 2D graphics on screen with Qt. Internally, Qt uses a low-level class called QPainter to render its widgets on the main window. Qt allows us to access and use the QPainter class for drawing vector graphics, text, 2D images, and even 3D graphics. You can make use of the QPainter class to create your own custom widgets or to create programs that rely heavily on computer graphics rendering such as video games, photo editors, 3D modeling tools, and so on.