Zizka's Sketchbook (Nudity and Vulgarity, NSFW)

[darktiste]

The issue i see is you prefer to use strong line to denote your darkest dark which isn't necessarly how it best represent the nature of the form.Those homoplate for example they are creating a noticeable  band of darker value but instead of being a large band you have compress it into smaller band which to my eye would translate to this a sharp edge when it reality it rather soft.Where you would see line as good place to be use is when two object touch each other such as the butt cheek,the arm and the pelvis and arm pit.

Also you probably leak some muscle knowledge when it come to the back of the figure to be aware of how to deal with the hatching there which made you fuse alone of them into a hatching that flatten the reality of thing.

I suggest you try to get more anatomy study of the muscle here more specifically the back muscle atleast you will know better before hand what under the skin and be able to know what might be the cause of the surface change for example.

Hatching is only one technique to express value and it probably the most challenging one in all honesty so i am wondering why you pick it as your go to method it a nice approch to learn form for sure but learning to blending is an other one that would give you much more realism not that it is preferable everything as it own pro and con.

One note on the butt cheek is how you have use to much hatching on the left buttcheek and than it suddenly cut to no hatching at all that would also tell my eye there a hard edge there.

Remember value change =Form change.  Round object have no corner so they are soft unless they merge into a geometric form with hard ege.

If you want to understand what i mean by soft and hard try to focus on the 4th shape in the image provided below everytime you see a straight line you have an hard edge.If it a curve line it mean soft transtion of value normally.