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Contour pencil shading uses directional shading which follows the contours of a form. In this example, contour shading is used in combination with lineweight, adjusting the pressure to create light and shade. This allows you to create strong dimensional effects in your pencil drawing. You can control these factors precisely or use a relaxed and expressive approach. Be sure to take perspective into account, so that the direction of shading changes correctly along a form drawn in perspective.