More Advanced Demo from my Drawing into Painting Class

This is a semi-colored grisaille underpainting done over a drawing done

with a mechanical pencil and then covered with a thin layer of acrylic

medium tinted orange. The oil colors used to develop the picture so far

where simply black and white, with a bit of brown and green on the mag-

nolia blossom.

The interesting color phenomenon occurring here is do to a situation

known as "optical grays". That is that any medium (center of a value scale

of five values) gray placed near a color or about the same value and intensity

will take on the complement of that color. Notice how the sphere appears to

be blue in parts. This is because the background is slightly orange. The

sphere is really only a gray made of black and white.

Color is amazing.