Page "Technical drawing" Paragraph 38

According to Viola ( 2005 ) " illustrative techniques are often designed in a way that even a person with no technical understanding clearly understands the piece of art.

The use of varying line widths to emphasize mass, proximity, and scale helped to make a simple line drawing more understandable to the lay person.

Cross hatching, stippling, and other low abstraction techniques gave greater depth and dimension to the subject matter ".