Cross-hatching is a drawing technique where lines are drawn in a criss-cross pattern to create the impression of depth, texture, or shading. Its antonyms refer to methods that do not involve this particular pattern of mark-making. One antonym could be "smooth shading," which involves using soft and gradual tonal transitions to create depth and form. Another opposite could be "scribbling," where loose and erratic lines are used to create a sense of energy and spontaneity. A third antonym could be "stippling," where small and uniform dots are used to create texture and shading. Overall, cross-hatching has a unique and recognizable appearance that sets it apart from other drawing techniques.