is this what you mean? (its tiny as forget because windows 7 ms paint is forgeten bullstuff and gives my crap stuffty aliasing for some reason)
i mean without even varying the line thickness but yeah that's pretty much it
a lot of people do it with cartoon-y drawings in this thread
like quantum does it kinda
tay probably does
uh powerdag definitely does in fact maybe that's who i'm thinking of
i bet bushido would but i can't remember the last time he drew hair jeez