The value of being able to conjure up convincing images rapidly cannot be overestimated. Notwithstanding all the new technical devices available today, from cameras to computers, the ability to sketch out one's visual ideas quickly is still one of the most powerful creative and communication tools.
Here are some basic procedures and techniques for controlling a drawing without the aid, or encumbrance, of drafting tools. With practice and experience, you can develop tremendous natural freehand skill and speed and still produce convincing images.
When rapidity of execution is a major concern, it is more important than ever to proceed from the general to the specific—from the overall outlines to the details.
By “fitting” the new lines and forms inside of what has already been drawn, you can keep all the parts in proportion.
Lay out the shape of the space or environment first. Even if you don't actually draw them, have an idea of where the horizon and vanishing points lie.
If there is no critical need to show something from a specific optical point of view, it is often ...