15 Form, weight, proportion and perspective
The only way I can deal with these four heavyweights in one paragraph is with this exercise. Make someone lie on the ground with their knees bent at right angles, similar to the posture they achieve when they’re sat on a chair. Stand closer to the legs so you can see the figure receding in perspective. Compare this to someone sitting on a chair. In the two figures, you’ll be able to compare parts of the body, in terms of form, proportion, perspective and the body’s response to gravity.