Well, these range in speed, but are often the second or third quickest, why? Because I don't fix them as much nor do I erase the base lines. These can be B&N, flat colored, shaded, and even rendered!
Rendered.
Shaded.
Shaded.
Shaded.
Rendered.
Colored.
Rendered.
Rendered.
Rendered.
Rendered.
Colored.
Colored.