I chose my favorite oldest daughter's high school picture because it fit the bill of the assignment -- head and shoulders shot and a lot of different light values. (Maybe some day, I'll do one of my favorite youngest daughter).
The picture below is the project about mid-way through. To get to this point, you had to outline the different shade values (converting color to black and white) draw a sketch and then draw an enlarged sketch (twice as big) for painting. The numbers on the large drawing are my shorthand for which value of grey, white or black to use.
The assignment this weekend was to paint for five hours. The art teacher warned us that "you can't fake five hours of painting." Here's where I was after about six hours before breaking for dinner.
Like a horse that smells the barn, getting this close I just couldn't stop. So after dinner I went back out to the shop (studio now?) and put in a couple of more hours to finish it. Here it is done at 9:30 PM (an early night for most projects where I'm close to the end and just can't stop). I'm not sure I captured the original image, but at least it looks like a person!
Here are the two previous homework assignments.
Line, Movement and Space
Shape as an Element: Harmony and Variety