look at the sphere to the right. Why does it look round? The answer is ........... because of the use of shading! the light source is at the upper right in this case...notice that as you move away from the light source how ...due to shading, the sphere looks round? we will apply this principal to our line design
first, we must make a series of curved lines similar to these in pencil, and then....when all mistakes have been addressed, go over them in sharpie
you will then use colored pencil to "shade" in the tubes to make them look 3 - dimensional...... please notice in the following examples how it appears that the light is "hitting straight on" and then we see darker values to the left and right