Constructing the Head: Yaw and Roll

The Three Axes of Rotation

Let's quickly define our terms for today:

• Yaw: Turning the head left or right, as if shaking your head "no."
• Roll: Tilting the head to the side, moving your ear towards your shoulder.

Combined with the pitch (up/down tilt) you've already learned, these three rotations give you the power to construct a head from any angle imaginable.

Part 1: Drawing the Turn (Yaw)

Yaw is perhaps the most common rotation you'll draw. It's what allows you to create profile views, three-quarter views, and everything in between. The key to controlling yaw in the Loomis method is managing the relationship between the front plane and the side plane of the head.

The core idea is simple: the more the head turns away from the viewer, the less of the front plane you see, and the more of the side plane becomes visible. In the Loomis construction, this is controlled by the width of the side-plane oval.

Let's get a concise visual explanation of this from Proko.

To solidify this concept, let's read a clear, text-based explanation that explicitly links this to an axis of rotation.

Here's a breakdown of how to think about yaw:

• Front View (0° turn): You see only the front plane. The side-plane ovals are not visible (or are infinitely thin lines on the sphere's edge).
• Three-Quarter View (~45° turn): The head is turned partially away. You draw a narrow oval for the side plane. The centerline of the face is shifted away from the center of the sphere.
• Profile View (90° turn): The head is turned completely to the side. The side plane now appears as a perfect circle, and it takes up half of the visible cranium. The centerline of the face runs along the very edge of the sphere.

A Step-by-Step Drawing Guide for Yaw

Now, let's put this into practice. The best way to learn this is to do it. The following video is a real-time demonstration of drawing the Loomis head at five different angles of yaw. I highly recommend you draw along with it.

Part 2: Drawing the Tilt (Roll)

Roll is the simplest of the three rotations to draw. When a head rolls, it tilts towards a shoulder without changing its pitch or yaw. There is no foreshortening involved. All the facial landmarks simply tilt together as a single unit.

The key to drawing roll is to tilt the entire construction framework at the start.

Let's return to the Proko article that defined the axes of rotation.

To construct a head with roll:

1. Draw the Sphere for the cranium.
2. Establish the Roll: Instead of drawing your initial crosshairs vertically and horizontally, draw them at an angle. The angle of this cross determines the angle of the roll.
3. Place the Side Plane: Draw the side-plane oval, aligning it with the new, tilted axis.
4. Draw Parallel Guidelines: Add the hairline and nose line, ensuring they are perfectly parallel to your tilted brow line.
5. Attach the Jaw: The jaw structure attaches as normal, but it follows the tilted orientation of your framework.

Because roll doesn't introduce perspective distortion, it's very predictable. Think of it as taking your finished, straight-on head drawing and simply rotating the whole page. The challenge comes when you combine roll with pitch and yaw, but the principle remains the same: establish the tilt of your foundational crosshairs first.

Practice Exercise (20-25 minutes)

Now it's time to combine your knowledge. Let's create a few construction drawings to solidify these concepts. Use your pencil and paper and aim for clean construction lines, not finished detail.

1. Yaw Practice (Three-Quarter View):

   • Draw a Loomis head in a three-quarter view, facing right.
   • Start with a sphere. Place a narrow side-plane oval on the left side.
   • Shift the centerline to the right and wrap it around the sphere.
   • Establish the thirds and attach the jaw.

2. Roll Practice (Front View):

   • Draw a Loomis head from the front view, but with a significant roll to the left (as if the character is curious).
   • Start with a sphere. Draw your brow line and centerline tilted significantly to the left.
   • Draw the two side-plane ovals, also aligned with this tilt.
   • Add the thirds (parallel to the tilted brow line) and attach the jaw.

3. Combination Practice (Challenge):

   • Combine the two. Draw a head in a three-quarter view (yaw) that also has a slight roll.
   • Start by establishing the roll: draw your tilted crosshairs.
   • Then establish the yaw: place the narrow side-plane oval according to your tilted axis.
   • Build the rest of the head from this combined framework.

This final drawing is a good representation of how you would deconstruct a real-life pose, which rarely exists on a single perfect axis.

Conclusion

Excellent work! You have now systematically broken down and practiced drawing the head across all three axes of rotation: pitch, yaw, and roll. This is a fundamental skill that moves you beyond copying and into true three-dimensional construction.

Key Takeaways:

• Yaw (turn) is controlled by the width of the side-plane oval. A narrow oval means a slight turn; a perfect circle means a full profile.
• Roll (tilt) is controlled by the angle of the initial crosshairs (brow line and centerline). The rest of the construction follows this initial tilt.
• These rotations can be combined. By establishing the yaw, pitch, and roll in your initial construction, you can accurately draw a head at any angle.

Next Lesson Preview:
You have spent several lessons mastering the deconstruction of an organic and complex form—the human head. Now, we are going to switch gears and apply the same principles of 3D deconstruction to a different subject. In the next module, "Deconstructing Architecture," we will begin by learning how to analyze architectural references and break them down into their primary rectangular forms. This will be a great opportunity to revisit and strengthen your perspective skills with simpler, box-like shapes.