This week's final exercise involves dipping the brush tip in a second darker color. Payne's Gray is suggested. The idea is to create three dimensionality with shadowing, all in one stroke. I quickly found this to be harder that expected. Getting two paints to proper levels, picking up just the right amount of Payne's Gray, and gaining the intuition to know just how long that gray holds up--well, practice is needed! :-)
This week's exercises proved to be more interesting and challenging than expected.