i'm sorry i'm not a native English speaker. could you please elaborate "make sure they contribute to making your image have form in space" a little bit for me?
did you mean that i should only shade within the regions that i think is the blackest to make the image as contrasting as possible?
and sorry for this amateur question:
what kind of pencils in terms of hardness, do you use for shading like this, because i feel really hard to shading a flat face, for example, a young woman's face. the reason is that the face is too flat, if i shade it too much in hoping to make it look 3D, the image will look dark and dirty. however, if i don't, the face will stay in 2D, not 3-dimensional at all. i think drawing an old man's face is easier, because i have wrinkles to work on.
i tried to use really hard(light) pencils for shading, say 6H, but the pencils are like little knifes, carving into the paper, leaving little "ditch" on the paper. therefore i can't achieve a smooth shading like yours. i can always see those stroke lines. or do i sharpen the pencil too much?
drawing is my hobby, nobody ever told me what to do. so sorry for the stupid question. thank you for your advice. and do you think this book is a good choice for learning shading? [link]
it will be great if you can publish a book in comic drawing. and i will be a loyal reader.