Trying to refine/practice my pencil shading, but it seems my understanding of the technique is very insuffisent... look at the image here please:
is there any logic behind the hatching lines? why do they change direction?
(like having a value represented by vertical lines, but in another area, the same value is represented using 45 degree lines...)
and while we are at it, if you know a better hatching/shading tutorial, i'd appreciate a link too..