Digital Paintings are hand painted directly into a digital file. They are raster images using bitmaps to store information. This means a large file needs a large bitmap. The larger the image, the more disk space the image file will take up. Scaling down these images is easy but enlarging a bitmap makes it pixelated or simply blurred. Hence for images which need to scaled to different sizes vector graphics are used.

See also Vector Designs versus Traditional Paintings.