The use of light and dark shading helps to communicate the smooth texture of the object and the way in which light is reflected off it.
4 Basic Pencil Shading Techniques
Pencils - tutorials, combos etc
Ways to create value..Example of Crosshatching More
Mark making..this seems simple but also like it could be very effective as an exercise/warm up activity. I think there's a lot of room for creativity in choosing mark designs as well. I like it :)
Ian Murphy Ornate Architecture, Graphite study | AGA Design 2015 resolution…
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Pencil Gradient Chart | Shading Techniques with Pencil - need some for school
Graphite Drawing Pencil Grades Chart
Lesson idea drawing
. the darker shading allows the viewer to feel that they can look into the inside of the shell. As your eye is drawn in deeper it gets darker.
Step by Step Eye Drawing