Step 4: Big Form Modelling of the Face – Portrait of Lisa
Big form modelling of the face. At this stage, focus on the overall structure of the face and neck, treating them as simple forms before refining smaller details. Big form modelling helps establish the large transitions of light and shadow, creating a strong sense of three-dimensionality.
- Simplify the Face into an Egg Shape
• Imagine the face as a basic egg-like form to understand how light falls across it.
• The lightest point is typically on the forehead, gradually darkening towards the chin and cheeks as the form turns away from the light. - Divide the Head into Major Planes
• Break the head into front and side planes to simplify how light interacts with the face.
• The front plane (forehead, nose, centre of lips, and chin) will generally be lighter, while the side planes (cheeks, jaw, temples) will be darker. - Group Colours and Tones for Each Plane
• Instead of blending too soon, establish clear separations between planes using average colour and tone for each.
• The front planes of the face should have higher chroma and lighter values, while the side planes should be lower in chroma and slightly darker.
• Pay close attention to the transition between planes—this will help avoid a flat appearance.
