shading

A screening against light or heat.

The lines or other marks used to fill in outlines of a sketch, engraving, or painting to represent gradations of color or darkness.

A small variation, gradation, or difference.

The act or process of making a shade; interception of light; obscuration.

That which represents the effect of light and shade in a drawing; the filling up of an outline.

Act or process of making a shade.

That filling up which represents the effect of more or less darkness, expressing rotundity, projection, etc., in a picture or a drawing.

Present participle of shade.

graded markings that indicate light or shaded areas in a drawing or painting

a gradation involving small or imperceptible differences between grades