What is hatched in orthographic sketches?

In orthographic sketches, hatching is used to represent different materials, textures, or to indicate sections and cut areas in a drawing. It helps distinguish between various components and provides clarity, making it easier to interpret the 3D object being represented. The pattern and density of the hatching can convey additional information about the material properties or the depth of cuts. Overall, hatching enhances the visual communication of complex designs in technical drawings.