In the context of drawing techniques, what does stippling primarily use to convey form?

Stippling is a drawing technique that utilizes a series of small dots to create texture, shading, and the illusion of depth and volume. By varying the density and placement of these dots, an artist can suggest light and shadow, thereby conveying form in a three-dimensional way. This method allows for subtle gradations in tone, which enhances the realism and detailed appearance of the work. The use of dots in stippling distinguishes it from other techniques, such as hatching or the use of solid lines, which rely on different approaches to create texture and form. Overall, the effectiveness of stippling lies in its unique ability to manipulate dots to achieve a visually appealing representation of shapes and surfaces.