Which shading technique involves parallel lines to create shadow?

The shading technique that involves the use of parallel lines to create shadow is hatching. This technique works by placing closely spaced lines next to each other, which can create a sense of depth and volume in the drawing. The density and spacing of these lines determine the intensity of the shadow; the closer the lines are together, the darker the area appears, while wider spacing results in lighter shading.

In contrast to other techniques, hatching is straightforward and emphasizes a linear approach to shading. This method is often utilized in drawing styles that benefit from a clear depiction of light and form, making it a foundational technique in both traditional and modern art practices. When mastering hatching, artists can effectively convey various textures and tones through controlled line work.