In 3D printing, the internal structure of a part is determined by a setting that controls the density and pattern inside the object. This internal support is crucial because it affects the strength, weight, print time, and material usage of the final product. An example is using a sparse grid pattern inside a model to provide sufficient support for the outer shell without making the object completely solid.
The utilization of internal structures offers significant advantages. It reduces the amount of material needed, leading to cost savings and lighter parts. It also enables faster print times compared to solid objects. Historically, early 3D printing focused on solid parts; however, the development of algorithms and software allowed for the creation of varied and efficient internal support structures, revolutionizing design possibilities and resource management.