Demos

Interactive diagrams illustrating concepts in art and drawing.

• Drawing Skills Training — Master basic drawing skills with simplified exercises.
• Light Zones — How a point light illuminates one hemisphere of a sphere
• Highlights — How surface roughness and viewing angle affect specular highlights
• Form Direction — How the direction a form is facing affects its shading
• Contrast Effect — How the surrounding value affects perceived lightness
• Bounce Light — How light bounces off a surface and illuminates another surface
• Crevice Shadows — How bounced light struggles to reach into crevices and caves
• Detail Level — How spatial frequency affects what you see at different viewing distances