You can apply this process in many ways in your typical pastel drawing
. You begin your initial drawing with big, general forms and then go through a process of refining and defining them. You block in your colors generally and then go through a process of refining and developing them. Every part and stage of the drawing goes through this process. Working on small areas at the expense of the rest of the drawing makes those areas too precious and limits your ability to make decisions about your work. Though you should be willing to sacrifice any part of the drawing for the good of the whole, the decisions you make while working the layering process helps keep those tough choices to a minimum.