"look what I had to work with"

I like to use concept sketches early on, when data and design are often incomplete. Sketches align expectations and solicit approval among any number of stakeholders. Their rough nature says, "work in progress." They invite input and allow flexibility going forward. Sometimes this quote from the 1989 Batman comes to mind when a client's expectations are too high. It's a thrill to promote a unified vision based on data from varied sources, and to follow a project's development until it goes to bid. Save the full rendering for when project data, modeling tools and time are available to truly solve the design gaps. A renderer may find the archive of hand-sketches helpful to make a finished product.