It’s a bit like taking a really low-resolution, pixelated image and trying to turn it into a large high-resolution poster. stl files our 3D printers use are notoriously difficult to modify. stl files are renowned for being difficult to work with, there is software out there that will help you take back control! Award winning designer James Novak, a.k.a edditive, takes time out from his own blog to show us some basic free tools that will have you modifying prints in no time. Have you ever downloaded a design from Cults and had a great idea for modifying it? Maybe engraving your name or an image into one of the surfaces, remove background, or adding some extra details? While.