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The modeling describes the process of forming the shape of an object. The two most common sources of 3D models are those that an artist or engineer originates on a computer with a [[3D modeling tool]], or models [[3-D scanning|scanned]] into a [[computer]] from real-world objects (Polygonal Modeling, Patch Modeling and NURBS Modeling are some popular tools used in 3D modeling). Models can also be produced [[procedural modeling|procedurally]] or via [[physical simulation]].<ref name="guide" />
Basically, a 3D model is formed from points called vertices that define the shape and form [[Polygon (computer graphics)|polygons]]. A polygon is an area formed from at least three vertices (a triangle). A polygon of n points is an n-gon.<ref>{{cite web |url = http://www.mathwords.com/n/n_gon.htm/ |title = n-gon |last = Simmons |first = Bruce |website = MathWords |access-date = 2018-11-30 |archive-url = https://web.archive.org/web/20181215193753/http://www.mathwords.com/n/n_gon.htm |archive-date = 2018-12-15 |url-status = dead }}</ref> The overall integrity of the model and its suitability to use in animation depend on the structure of the polygons.<ref name="guide" />
===Layout and animation===
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