Cross-hatching is a drawing technique used to create shading and texture. It involves drawing closely spaced parallel lines in one direction, then layering another set of parallel lines in a different direction. This method allows artists to build depth and dimension in their work, making it appear more three-dimensional. Artists often use cross-hatching in various mediums, including pencil, ink, and charcoal. It is commonly seen in illustrations, sketches, and even in the works of famous artists like Rembrandt and Albrecht Dürer. The technique can vary in density and angle, allowing for a wide range of effects and styles.