The bottom of the nose usually aligns with the bottom of the earlobes.
Focus on the "under-plane" (the nostrils and septum) rather than the bridge.
Use a mechanical pencil or a "stippling" motion for subtle skin texture.
Use gradual transitions to create the illusion of curved skin.
The human face follows surprisingly consistent mathematical rules.
Draw "clumps" of hair first, then add individual strands as highlights last. The Power of Texture
