As a follow up to drawing cross contour scribble-dee-boo lines to capture the essence of a frontal face, the students began to look at how light falls on the facial planes.  Again, this being a frontal view, these were over simplified in order to create a mask-like sensibility.  I asked the students to grab three related colours from the oil pastel boxes and away they went.

Cross Contour Still LIfe

Cross Contour Face

Planes of the face…construction paper/oil pastel…talking about light source and projecting planes…I drew a concavity and convex forms (lenses/bowls) on the white board using hatching.

The following Youtube video demonstrates a more advanced approach and I think that it’s very well explained.