When drawing a three dimensional object like this pitcher, value and texture are used to depict the visual qualities of surface and volume. The finished drawing on the left, started as a contour drawing shown below. This first drawing was done in pencil providing an opportunity to adjust and change the drawing to ensure the shape and proportions are correctly done. When beginning a drawing, the time and focus you spend working on getting the shape that you want is significant since everything is then added to this drawing. At this point the pitcher appears flat.
In the next image, a thin marker was used to redraw the shape and texture is added. This texture provides shading and value. The pitcher gains it’s three dimensional shape and the image becomes more interesting and is easily recognizable.
Want to learn more about more about texture and value? Check out my book Exploring Perspective Hand Drawing, Fundamentals for Interior Design. Included with the book is a DVD with video demonstrations.