To define a rendering scene in computer 3D graphics, model, view, and projection is the cleanest approach. It dissects a scene into these three logical concepts that helps us visualize the scene clearly before it appears on paper or in the form of a program. It will not be wrong to say that it is a modular approach to scene visualization.

Object: An object is a defined by a set of vertices in the 3D space. Each object has its own origin. For example, a cube contains eight vertices with respect to the origin at the center. The vertices used to define the object are called object coordinates:

Model: Modeling in 3D graphics is a transformation process where an object is displaced to an arbitrary position in the 3D space. This 3D space is called world space (also known as model space). For example, we can use several instances of our cube object and place them in the 3D space so that they form the English alphabet T.