Immediately after the glabella, the nasal bone turns upward and then back down after the connection to the lateral cartilage.
This keystone shape is slanted downward and will usually have some halftone on it connecting the eye sockets together. Once familiar with the minor planes, you can easily figure out what each halftone shape represents and how to design it in your drawing. These subtle plane changes are usually seen as halftone shapes which to the untrained eye appear to be random. It’s important to memorize the subtle plane changes in all the different part of the nose.
