In a 4 x 5 in. frame, in your sketchbook, using graphite pencils, draw a continuous field composition of an actual texture (from a real object observed). Your image should only exhibit the details of the texture not the edges of the object. In the image above, the edge of the leaf is out of the image area. It may help to light your subject with a single light source to cast shadows from all the peaks and valleys of the texture. Remember, texture drawings are essentially value drawings. Contrast and gradations are very important for establishing visual interest as well as depth.