Secrets To Drawing Realistic Faces -

Avoid harsh borders around the nose or lips; use shading to define edges.

In the real world, there are no outlines—only where one shadow meets a lighter area. Secrets to Drawing Realistic Faces

Which (eyes, nose, hair) gives you the most trouble? Avoid harsh borders around the nose or lips;

The human face follows surprisingly consistent mathematical rules. Secrets to Drawing Realistic Faces

Ensure you have a true black and a bright white highlight.