3D modeling is the computer aided design (CAD) term used to describe the creation of a virtual 3D object. Also 3D modeling is the process of developing a mathematical representation of any three-dimensional surface of object using specialized software. Product that it made is 3D model.
Modeling can be used to create more ordinary and no ordinary objects. Painters and sketch artists may create 3D models to help them draw complex objects from unusual viewpoints.
3D model is usually originated on the computer by engineer using some kind of 3d modeling tools.
Three dimensional (3D) computer graphics are widely used and they are almost too common to see anywhere, let it be movies, products designs, advertisements, etc. Although they are commonly seen, that doesn’t mean they are easily created. In order to interactively control a 3D object, it must be created in a 3D authoring tool which usually cost a lot to a non-professional user. Models may be created automatically or manually.
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There is a plenty variety of fields where 3D modeling is used. For example such as architecture and construction for representation at building objects, in engineering most are used in manufacturing for CNC machines working, earth science are used for to construct 3D geological models, 3D models are widely used anywhere in 3D graphics, in video game industry as assets for computer games and many more fields.
As it is mentioned before for virtual creating of 3D model (3D object) are used specialized software. Some of them are Sketch up, Soft IMAGE, 3D s MAX also that are used in CAD engineering like AutoCAD, Solid WORKS, 3D s MAX, ArchiCAD, and more.