Through the other articles in this series I have described the two main approaches to modeling as well as presented some of the history behind them. This article focuses on a single artist who managed to model using both approaches, each during two different stages of his career: the two faces, or periods, of Velazquez.
The previous articles on modeling dealt with the practicalities — how one goes about modeling via form over value, and value over form. This article explains the history and reasonings behind those two approaches. I refer to their adherents as the artists of the mind and the artists of the eye.
Most Sight-Size trained artists model using the value over form approach. Modeling in this way helps the artist maintain the big-look (which is representing the image as a whole ensemble), as well as the unity of effect. This approach naturally reduces the chance of falling into piecemeal seeing.
Modeling is the act of turning form through value or line, a process which is integral to representing your impression of the scene as well as the illusion of form. Although there is some crossover, there are essentially two approaches to modeling: form over value, and value over form. As its name implies, form over value modeling tends to prioritize the representation of form over that of value. The opposite is true for value over form modeling.