The subdivision components partition an elevation object. They are useful to create perspective effects, where parts closer to the viewer are drawn with darker, stronger lines and parts farther from the user are drawn with lighter, thinner lines. Subdivisions can have no individual material assignments. However the display properties of the subdivisions can be used for the surface hatching of the subdivisions by selecting Use Subdivision Properties for Surface Hatching in the Other tab of the 2D elevation display properties.
Subdivisions are a display component of both 2D and 3D elevation objects.
The subdivision components are either controlled by the 2D Section/Elevation Linework component of the material or by the 3D Body component of a material.