3D printing is a manufacturing technique that is particularly notable for its capacity to produce rapid prototypes. However, like any technique, it has limitations when constructing objects with non-self-supporting regions due to their shape. Moreover, depending on the material used for printing, it is essential to consider several additional factors to prevent deformations or failed prints and minimize post-processing of the printed models. Therefore, this chapter focuses on the processes that must be carried out between the availability of the 3D model and the final printed object. This journey entails examining the diverse parameters that must be taken into account when making a 3D print as well as various considerations derived from using different materials. Finally, this chapter concludes with a list of ten elements to consider before printing a 3D model.