Comment posted Jan.9th, 2013, viewed 17 times
EXERCISE 3/4 MIDDLE TO LIGHT
This doesn't appear to have worked too well for you, and it's probably something you'll need to experiment with. It's a very useful technique but it is paper/pencil dependant. My Mellotex needs a solid coating of HB and/or 2H before the 2B is layered over it. If the graphite and clay of the harder grades doesn't fill the tooth, it offers too many opportunities for the 2B to be accepted. Ideally the 2B should take in some places and slide over the harder grade in others. This gives a broken appearance that subsequent hard blending will exaggerate by causing some of the graphite to clump together.
EXERCISE 3/5 MIDTONES - LIGHT VALUES (stump)
There is a visual interest without any of it being clearly defined - which is good :o) This could be either an inside or outside corner, and it works in either case. Drawing with a stump or tortillon is often a very rewarding and free way of working, and well worth experimenting with as a viable drawing method.
EXERCISE 3/6 VERY LIGHT VALUES + LILY
More blending would help to smooth your darker tones seamlessly into the lighter ones. You've made good use of cast shadows that have removed much of the need for outline. But some outline does remain, and line is not a part of Nature. Always look for ways that you can use tonal differences to visually divide planes. We see them that way in real life. For example, you could have darkened the stem to remove the need for the outline used on the 5 and 7 o'clock petals - in the same way that you did successfully for the 10 o'clock petal.
Your shading is not very delicate, It follows the contours but you need to fade the end of every line more and not leave gaps between them. Then it just needs a degree of light blending to smooth the darker tones into the edges of the highlights.
I feel you had a clear idea of the three-dimensional shapes as you shaded this. I can fully understand its three-dimensional form. And as your shading follows the contours of the petals, any visible line should read as surface detailing. I like the dark throat of the Lily too, because it allows you to use negative drawing for the stamens, which makes them stand out from the petal behind - although it could have been even darker.
In response to image: