• This article covers a feature introduced in SketchUp 2018. For help working with STL files in earlier versions of SketchUp, see 3D Printing a Model. In SketchUp, you can import and export STL files, which are used in 3D printing. As explained in 3D Printing a Model, for a SketchUp model to become a successful 3D printout, the model needs to meet certain criteria, such as having a base and a volume and being a solid.