Few words about Sketches

I remember that a time ago two persons asked me about it)

Tutorial about Sketches this time, next Tutorial will be about fur, But you also can suggest a theme for future tutorials)

Unfortunately I need a time to do correct english translation but I will try to do it as fast as possible^^

Full size:

Rus: http://yakovlev-vad.deviantart.com/art/Few-words-about-sketches-Rus-610118516

Eng: http://yakovlev-vad.deviantart.com/art/Few-words-about-sketches-Eng-610320275