Planes of the face based on the Andrew Loomis method
The lack of angles in Andrew Loomis' books doesn't help people who like to draw understand better. So I decided to buy 3D models inspired by his explanatory drawings and I traced the renderings by hand.
If you draw and struggle with head shots, feel free to save these images and share them on the internet. I hope they help you as much as they help me draw the lights and shadows of the human head better.