Use the watercolor or solid color styles. Change your pencil stroke to a marker or dark - black pencil color. The stroked styles take some experience with actual drawing to use well. The watercolor styles are easy to learn. If you are a subscrption memeber, you've got access to AU tutorials on the AU onlince site. Search for a file called "Integrating Autodesk Impression into your Workflow." The PDF file associated with that class has some hints on working with perspective drawings, that might be helpful.