In this light and shadow series, we look at the theory, drawing and painting of a simple form focusing on shadow, light and edges.
How to Draw the Human Face
The Art of the Shadow: How Painters Have Gotten It Wrong for Centuries
Color Theory Part 9: The Anatomy of Shadows
How to Draw Shadows & Lights with Shading Tutorials on Curved & Flat Objects as Well as Reflected Lights & Cast Shadows
How to draw a shadow in two point perspective.
Drawing Lesson - A Theory of Light and Shade
How to Shade. There is a Method to the Madness, by Myra Naito
Where Are The Shadows On A Face? [And How To Draw Them]
Seeing Light & Shadows - ART WITH MRS. RIEDEL
How to Shade a Drawing (Light & Shadow : Part 2 of 3)
How To Draw Perspective Shadow - Drawing Shadows In Perspective
Light and Shadow - Instructables