Separating the light family from the shadow family

Group form planes into consistent light and shadow families so the light direction and volume remain readable.

What it is

Assign each plane of a form to either the light family or the shadow family. The light family includes direct light, light halftones, and brightest accents. The shadow family includes core shadow, reflected light, and occlusion, the darkest contact points.

The terminator is the border where the form turns from facing the light to facing away. Keep every light-family value lighter than every shadow-family value, including reflected light and the softest halftones.

Begin a pencil block-in with 2 values: a flat tone for shadow areas and plain paper for light areas. Add value variation within each family after the separation reads correctly.

Why it matters

Separating the families keeps the light source and form readable. Weak separation can make shadows too light, halftones too dark, faces look dirty, and volumes appear flat.

You can check it when

• ✓Map a drawing with one confident, unbroken shape for all areas in the shadow family.
• ✓Squint at your study and verify that reflected light remains darker than the light-side halftones.

Related skills

• The shadow family (core, form, cast, contact/occlusion)
• The light family (halftones, highlights, speculars, reflected light, terminator)
• Plane analysis and turning form with value
• Positive-negative space and notan
• Separating form edges from cast-shadow edges
• Direction and falloff
• Value grouping (simplifying to 2–5 major value groups)