Painting in the style of Georgia O'Keefe: https://www.youtube.com/watch?v=B-z2hpAVh2U
Painting in the style of Joël Penkman: https://www.youtube.com/watch?v=t8JuxS2bT8U
Joël Penkman tonal lesson: https://www.youtube.com/watch?v=ciE4dJILI8M&feature=youtu.be
Tonal drawing using a grid: https://www.youtube.com/watch?v=YoNfZ0-KDQg&t=98s
How to draw freehand fast drawing using pen: https://www.youtube.com/watch?v=-ZphMtrOOYo&t=2s
Drawing free hand using crop and enlarge composition: https://www.youtube.com/watch?v=yLsKQ74a-SQ&t=26s
Fun with oil pastels: https://www.youtube.com/watch?v=FBdP51U1zkM&t=48s