Modeling
3D printable models may be created with a computer-aided design (CAD)
package, via a 3D scanner, or by a plain digital camera and
photogrammetry software. 3D printed models created with CAD result in
reduced errors and can be corrected before printing, allowing
verification in the design of the object before it is printed. The
manual modeling process of preparing geometric data for 3D computer
graphics is similar to plastic arts such as sculpting. 3D scanning is a
process of collecting digital data on the shape and appearance of a real
object, creating a digital model based on it.
CAD model used for 3D printing.