Modeling the Character - Game Character Creation with Blender and Unity - page 72

Figure 3.43
Extruding the nose

2. Select the two faces at the bottom of the nose and turn of Clipping in the Mirror
modifier. Extrude these polygons but do not move them anywhere. Instead, scale
them down and press Alt+Shift+S to round the faces out with the To Sphere tool.
Extrude into the nasal cavity and scale down again slightly. Finally, add one more
extrusion to complete the nostrils (Figure 3.44).
3. Adjust the facial geometry as needed to get a result you're happy with.

Figure 3.44
Creating nostril
geometry