|On the left, a leaf drawn with pen scribbles; on the right, the same leaf drawn with a mechanical pencil.|
The leaf at the top left has a free and casual feeling; I used random, rather large scribbles to build up the planes and masses. The leaf sketched in pencil (top right) has a much softer feeling - this particular pencil allows for fine lines and a gradation of grays. Notice how the pencil lines follow the curve of the leaf between the veins, and how each line has continuity in direction, totally unlike the scribble texture.
The leaf in the bottom example (left) has an ink outline with stippled dots describing the shadows and masses. This lends a more formal feeling to the drawing, and is often used for botanical illustrations because the dots reproduce well and can indicate a lot of detail. This particular drawing doesn’t contain much detail, because of the size of the dots relative to the size of the subject. Imagine if you were to make a large drawing with many dots, and how descriptive it could be! Needless to say, this method is time-consuming and not a good choice for sketching in the field, although it can have its purposes.
The next leaf is also in ink, but with hatching and cross-hatching to show form and value. This technique can mimic old ink engravings if the lines are very parallel and evenly spaced, or be more free if the lines are more haphazard (like mine). Each technique is unique, and can be combined to create even more interesting lines.
|Left, an inked outline with stippling in pen; right, the same pen but with cross-hatching.|
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