Certain parts of the face have a lot of detail in a very small area, making the model of the face very complicated, as many polygons are needed in a small space. Once such area are the nostrils. When creating the splines to get the basic shape of the face, a small gap was left around the area of the nostrils so that more detail could be added later.
Additional polygons were created by selecting the
Edge mode inside of the Edit Poly settings. The edges around the nostrils were selected, and
Extruded by holding the SHIFT key and using the
Move tool. Another technique used here in order to close off the nostril was to use the
Create tool under the
Vertex mode, and selecting four adjacent verteces. This creates a new quad-sided polygon, where as extruding would have created three seperate polygons.
To create the 'hole' for the nostrils, the inner polygons were selected and extruded inwards towards the head.