Light Logic: How Light Describes Form
Introduced| English |
|---|
| highlight/ˈhaɪlaɪt/ |
| halftone/ˈhɑːftəʊn/ |
| core shadow/kɔː ˈʃædəʊ/ |
| reflected light/rɪˈflektɪd laɪt/ |
| cast shadow/kæst ˈʃædəʊ/ |
One light, six zones
- One light source creates a predictable pattern — learn it and any form becomes drawable.
- The six zones: highlight 高光, light, halftone 中间调, core shadow 明暗交界线, reflected light 反光, cast shadow 投影.
- Every value in your drawing must be explainable by the light's direction.
Place the zone
Sort each description into its zone of light.
The darkest value ON the form itself is the ____.
The core shadow is the darkest band on the form; the cast shadow lies on the ground.
Select all zones that belong to the shadow family.
The highlight leads the light family.
The two most-missed zones
- The core shadow is the darkest band ON the form, where the surface turns fully from the light.
- Reflected light bounces into the shadow side — but is always darker than any lit halftone.
- Making reflected light too bright is the classic error that flattens the form.
Reflected light can be brighter than the lit halftones.
Reflected light always stays darker than any lit value.
Match the edge to its cause.
Edges describe how the form turns.
Edges tell the story
- The cast shadow is darkest and sharpest where it meets the object, softer further away.
- Hard shadow edges mean a sharp turn or a cast shadow; soft edges mean a gradual turn.
- Check the logic, not just the look — light cannot skip a zone.
The cast shadow is darkest and sharpest where it ____ the object.
Contact = darkest, sharpest.
If your reflected light is as bright as the lit side, the form breaks — the eye reads two light sources. Keep the whole shadow family darker than the whole light family.
Set an egg on white paper under one lamp. Find all six zones, then check: highlight brightest, core shadow darkest on the egg, cast shadow darkest overall at the contact point, reflected light quietly lifting the shadow's edge.
One light makes six zones: highlight → light → halftone → core shadow → reflected light, plus the cast shadow. Core shadow darkest on the form; reflected light never brighter than lit halftones; edges follow the turn.