or shading is an old engrossing technique and very prevelant
in sign painting. According to sign painting literature, shading
is added to improve the appearance of the letters, and make
them stand out. The shading is done with the idea that light
is casting a shadow from a raised object. In sign painting,
shading is usually done on the bottom, to the left. This is
less detailed and uses more straight lines. But for script style
lettering bottom right is used, because it flows better.
usually shadow to the right bottom. For calligraphers, either
way is fine. We usually use diluted ink and a brush to do shading.
But a pen can be used. A nice touch is to use brush markers
on coated paper stock and use a grey brush marker to shade a
running script style.