In the old days before sophisticated computer programs were available to graphic artists, we had to use "old school" techniques for illustrations and concept drawings. In the following example, I had created the original drawing using colored pencil, air marker, air brush and frisket. Once a medium was committed to vellum, it was not possible to go back. Undo hadn't been invented yet.
|Concept Car Hand Drawing, colored pencil, air pen.|
|Hand-drawing restored and converted to a scalable vector graphic|
I'm The illustration is a flat 2D image created using a 2D graphics program. I could have used a 3D graphics program to create a similar image. I would create a virtual "scene", generate a computer rendering, which could be "photo-realistic. That would have been exceedingly time-consumptive, although had I used a 3D graphics program, I could have produced an infinite number of images or animations, from different angles and with a variety of lighting and environmental effects. In this case, all I wanted was a simple reproduction of the original media-on-vellum illustration.