The drawing with little value variation:
The drawing with values heightened:
The first one is very accurate, the second is accurate and has panache. That's the difference that values can make. All that changed was that I darkened certain areas in the second one.
Purcell offers a few ideas to help you see values more:
- when looking at a possible subject, don't describe the objects, describe the values (e.g. I like those dark vertical shapes against that light patch.)
- go through a stack of photos, paint the darkest shapes, add some water and paint the midtone shapes, then move on to the next photo - the idea being to train yourself to see the value shapes first