Here I show you a colorful example of Picture to People "Real Pencil" renderer in action.
This example photo was chosen because it has very clear curves. This way you can see very easily how the drawing trace respect and follow the input geometry locally and globally.
The third image is a zoom-in of a part of the second one. Realize like the drawing is made of a big amount of very small and delicate strokes, just as people are used to make by hand.