In the large format world, to understand how to build files, you really need to understand the differences between these 2 most common file types. There are two kinds of computer graphics - Bitmap (composed of pixels) and Vector (composed of paths). A bitmap image uses a grid of individual pixels where each pixel can be a different color or shade. These files are composed of pixels. Vector graphics use mathematical relationships between points and the paths connecting them to describe an image. These files are composed of paths.