One of the important design elements in an interior line drawing is rendering texture which is the surface quality of an object. In an image without the element of color, a variety of texture and pattern is used to distinguish one object from another. It also shows value which is the range of light and dark areas. Rendering to me, is identifying, imitating and expressing the flavor of a material. It gives interest and unique character to the image. To achieve a variety of texture and pattern, different types of lines can be used such as curved, broken and wavy along with dots or stippling. Here are a few broken line and dot texture studies that will generate ideas.