In this project we used shading, crosshatching, and stippling to give our sketches dimension and a more realistic feel. We used patterns/shadows to portray where the object was exposed to light and reflections of light. My class was given about two weeks to complete this project. Each group (approximately 3-4 students) was given some generic objects: fake fruit, some type of a box, a golf ball, a cone shaped object, a can or paper towels. Each group then proceeded to angle a shadeless lamp towards their object setup. They had to sketch the same scene on three separate pieces of paper and used a different form of pattern to express the value.
(E) This is a great example of value studies. You can see the section of the paper towel where it is translucent and where it is the darkest.