Procreate is a raster-based program, meaning it relies on pixels to make up a digital image or design. Pixels are tiny squares of color that are combined in a grid to create a whole digital image. The more pixels used to create the image, the higher the image quality will be (and the larger the file size). As you enlarge a raster-based file, it becomes easier to see each individual pixel. Because of this, a raster-based image gradually loses quality as you increase its size. Common raster file types include .jpg, .png, .gif, and .tiff. A vector-based program uses lines and curves, rather than pixels, to make up a digital image or design. These programs rely on mathematical formulas that define the relationship between lines and curves of an image. This means vector-based files can scale up to any size without losing quality, as each line and curve will scale up accordingly and proportionately. Common vector file types include .ai, .eps, and .svg.