The
nose is formed by a series of curved planes. This
makes it difficult to draw as there are very few
lines to help us describe its shape.
Start
by drawing what you can see, namely the inside and
outside edges of the nostrils. Then try to outline
the main areas of tone that define the planes of the
nose.
Draw
these lightly as you want them to disappear under
your shading at a later stage in the drawing.