tonal study, pencil on paper, 6 hours

(detail of above)

This is a drawing of a 6-hour pose. Yesterday for the first half I focused on the inner movement curves, the block-in, and finally the detailed contour. Tim and Michelle are teaching us to think of the contour three-dimensionally. So I am thinking of the contour wrapping around the body, moving towards and away from me.

I've taken my drawing into Adobe Illustrator and used the software to recreated my original inner movement curves to diagram the process I am learning:

As Tim teaches the technique, we draw three interrelated movements:

We start with the theme, which is the fundamental inner movement curve. The theme starts at the crown of the head, and flows down the center line of the face, down to the big toe of the standing leg, or the leg holding the most weight.

This is a precise curve, it describes specific points on the body and the relationships between these points. (In contrast to simply "expressing" the movement. This is a record of what we see and know about the body, it's not exaggeration or expressionism.)

The second line we draw (above) is the countertheme - the orange line. It's a secondary inner movement curve that travels from the top of the head, wrapping around the body the opposite direction and down the non-standing leg.

Third, we draw the ornament (above). This is the third interrelated movement. As with the theme and countertheme, the ornament wraps around the forms, moving side to side and back to front.

All of the curves wrap around the body three dimensionally. Above is the same countertheme curve, but I've created dotted segments to show where I am imagining it wrapping around the back side of the form. (I do not modify the figure to fit these curves, it's amazing the interrelations it's possible to see once you start looking this way.)

Above I've shown how adding more and more interrelated movement curves begins to describe the form. As I get more and more detailed with my contour line, I can see how every form on the body follows this wrapping helix pattern.

It's interesting to recreate the curves in Adobe Illustrator. The program creates Bezier curves that have a certain mathematical tensile force, and you have to learn to manipulate them to create flowing curves without awkward bends. The behavior of of Bezier curves is amazingly conducive to the Inner Movement Curves - it was shockingly easy to recreate the curves with the software. I have a feeling there is an implicit relationship between the cohesive, efficient, and functional forms of the body and mathematical curves.

Update added 5/03/08
Bezier was a 20th century French draftsman! Wikipedia has a great entry on Bezier curves, and near the bottom of the page you can see elegant animations for how Bezier curves are calculated.

After spending so much time on the contour, I moved on to the tonal value shading. I was surprised how quickly the value study progressed. I think learning the contour with this method gives me a deep understanding of the three dimensional figure, so flowing the light across the form is easier.

I'll end with a quote from Tim: