How to draw Light Logic

How to draw Light Logic

What you need

• Drawing paper Cartridge or sketch paper with a little tooth.
• Blue pencil A light blue col-erase pencil, or a very light HB.
• Graphite pencils HB and 2B; a 4B or 6B for the darkest darks.
• Kneaded eraser Press and lift; pinch it to a point for highlights.
• Sharpener A sharp point makes cleaner hatching.

Step by step

1. 
   01

   Placement

   One lamp, two objects

   A ball and a box, lit by one lamp at the upper left. Block them in lightly and draw an arrow for the light.

2. 
   02

   Construction

   The terminator and the shadow shapes

   Commit the outlines. Then find the terminator, where the form turns away from the light, and the shapes of the cast shadows.

3. 
   03

   Light and shadow

   Two values

   Squint until only two values are left. Hatch everything in shadow, form and cast shadows alike, one flat grey. Leave the light as paper.

4. 
   04

   Light and shadow

   Halftones in the light

   Now the light family: a halftone that darkens as the form turns from the lamp. Leave what faces the lamp bare.

5. 
   05

   Light and shadow

   The core shadow

   Just past the terminator the shadow is darkest: the core shadow. A band on the ball; the upper part of the box’s dark face.

6. 
   06

   Light and shadow

   Reflected light

   Light bounced up from the table lifts the shadow along the ball’s lower edge. Lift it with the eraser, but only a little.

7. 
   07

   Light and shadow

   Cast shadows

   Darken each cast shadow where it leaves its object. It is sharp and dark near the object, softer and lighter as it runs away.

8. 
   08

   Finishing touches

   The occlusion shadow

   Press darkest where each object meets the table: the occlusion shadow. Then touch up the core where it turns, and stop.