Editing Geometric primitive (section)

== In 3D modelling ==

In CAD software or [[3D modelling]], the interface may present the user with the ability to create primitives which may be further modified by edits.<ref>{{cite web|title=3d studio primitives|url=https://knowledge.autodesk.com/support/3ds-max/learn-explore/caas/CloudHelp/cloudhelp/2017/ENU/3DSMax/files/GUID-66152BDE-BA64-423F-8472-C1F0EB409E16-htm.html}}</ref> For example, in the practice of [[box modelling]] the user will start with a cuboid, then use extrusion and other operations to create the model. In this use the primitive is just a convenient starting point, rather than the fundamental unit of modelling.

A 3D package may also include a list of extended primitives which are more complex shapes that come with the package.  For example, a [[Utah teapot|teapot]] is listed as a primitive in [[3D Studio Max]].