When you upload your file on our platform, you can choose the orientation of your model in the 3D printer during the 3D printing process. The orientation impacts which part of the object cools down first (the layers manufactured first will cool down first) and the surface aspect of the object (depending on the orientation and shape of your model, the layers can be more or less visible). Once you've uploaded your file, click on the 'optimize' tab to customize the orientation of your model.