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Teaching Images



Colored Cube Illusion. The green square is the exact same color as the red square.
In the checkerboard illusion, square #1 and #2 are the exact same gray.
White (2) can sometimes appear darker in shadow than black (1) and (3) in direct sunlight.
A photo of a sphere with the various tones caused by the play of light.
A computer tracked the eye movements of fifteen viewers and produced this “heatmap,” showing where virtually everyone looked (red) and where almost no one looked (blue or dark).
Four steps in a watercolor sequence, painted on location in Bourges, France.
A five-hour plein air painting in four stages, starting with transparent washes of oil color and ending with fine details.
These two paintings were done of the same model, one in white light, and the other in colored lights. The color you mix is a combination of the local color and the color of the light source.
Chart of watercolor pigment combinations. Each possible mixture is at the intersection of a horizontal row and a vertical column. The colors are combined as overlaid washes.
The Munsell color wheel divides the color universe into ten evenly spaced hues.
Yurmby wheel, yellow, red, magenta, blue, cyan, and green
Transmitted light is light that has passed diffusely through a thin, translucent material, sometimes becoming richly colored. It’s found in leaves, balloons, and flags.
Subsurface scattering is the phenomenon where light enters any thick, translucent material and spreads out beneath the surface, creating a glow.
Sunlight reflected from a red card into the shadows. Every illuminated object becomes a source of reflected light.
Broad lighting is a type of lighting that shines mainly on the near side of a face, when the face is slightly turned away from the viewer.
A tone paper study drawn from a live model as preparation for a painting of a Moche prisoner. The final illustration appeared in National Geographic magazine.
A Lorraine glass is a piece of glass backed with black paint, used to reflect a scene darkly, thus helping a painter see the broad tonal masses.
The pyramid of vision is the sector of the complete viewable scene bounded by the edges of the picture. It’s often less than 45 degrees.
This is what I carry in my watercolor sketching bag.
Watercolor kit includes: 1. paper towels, 2. pencil box, 3. water-soluble colored pencils, 4. sharpener, 5. water container, 6. watercolor sketchbook, 7. small half-pan kit.
Watercolor setup in action, with the paint box clipped to the left side of the watercolor book.