and historically artists in all cultures have displayed a need to "fill up that space with Art!"
suggesting mid to dark tones, as in the sketch above.
Office without my sketchbook when I got the urge to draw the folks ahead of me.
Here it is the in hair and top of this young artist. Then I've gone beyond just line, and it is an actual half-tone.
As my old mentor at Channel three used to say, "We are Masters of the cheap optical trick."
Next time; more tricks.