Building Sections

Section views provide an understandable representation of hidden or complicated parts of 3D models. A section is technically an orthographic projection of a 3D object from the position of a plane through the object. This produces a view which shows what would be seen if one cut through the model and looked at what was cut. The image of the kiwifruit (Figure 5) provides a good example of sections. The kiwifruit is cut and rotated until the cut face is shown to the viewer. An example section is shown in Figure 6.


Figure 5

By André Karwath aka Aka (Own work) [CC-BY-SA-2.5], via Wikimedia Commons


Figure 6

Sections like this show structural features not externally visible, or not clearly visible. The style of crosshatching indicates the type of material the section passes through.