3D printing, also known as additive manufacturing (AM), refers to processes used to create a 3d object in which material is joined or solidified under computer control to create an object, with material being added together (such as liquid molecules or powder grains being fused together). Objects can be of almost any shape or geometry and typically are produced using digital model data from a 3d model or another electronic data source such as an Additive manufacturing file (AMF) file (usually in sequential layers).
3D printable models may be created with a computer aided design (CAD) package, via a 3D scanner, or by a plain digital camera and photogrammatery 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.
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