3D models typically start with the creation of a mesh. Most 3D software allows for a mesh to be viewed in a wireframe mode, which allows the user to see the lines and vertices that create the 3D shape. The mesh contains important data that computers use to properly render the 3D model. Thus, polygons become a natural necessity due to the nature of how meshes are created and used in real-time. This is also an advantage 3D has over traditional art forms because a mesh can be animated and changed in real-time non-destructively.