Circle, Center Line, and Tilt: Constructing Faces in Perspective

Object Drawing Lessons

This lesson teaches a reliable construction method for drawing a face using a circle, a vertical center line, a horizontal center line, and a tilt angle. You will learn to place the eyes, nose, mouth, and ears on upright and tilted heads so features stay aligned with the head's orientation. The method uses simple geometry and checkable proportions. All measurements are hypothetical examples; measure your own paper and tools. The focus is construction, not shading or expression.

Practice materials: Printable downloads are not available for this lesson yet. Use the instructions and four exercises below.

Reference illustration

Use the stated measurements and conventions for each exercise.

The circle and center lines

Start with a circle drawn lightly. The circle represents the cranium, not the whole head. Draw a vertical center line through the circle's center; this line marks the midline of the face. Draw a horizontal center line through the center; this marks the eye line. These two lines are the reference grid for every feature.

The vertical center line divides the face into left and right halves. The horizontal center line sits at the eye level. On an upright head, the vertical line is straight up and down. On a tilted head, the whole grid rotates by the tilt angle, but the lines stay perpendicular to each other.

1. Draw a circle lightly with a diameter of about 8 cm (hypothetical example).
2. Mark the center point and draw a vertical line through it, extending slightly beyond the circle.
3. Draw a horizontal line through the center, perpendicular to the vertical line.
4. Label the top, bottom, left, and right intersections of the circle with the center lines.

Placing features on the upright head

On the upright head, the eye line is the horizontal center line. Eyes sit on this line, spaced so that one eye width fits between them. The nose base sits about halfway between the eye line and the bottom of the circle. The mouth line sits about one-third of the way from the nose base to the bottom of the circle. Ears span from the eye line to the nose base.

Use the vertical center line to keep the nose and mouth centered. The vertical center line runs midway between the eyes, with one eye width of space between the inner corners when the face is upright. Check that the distance from the top of the circle to the eye line equals the distance from the eye line to the bottom of the circle.

1. Mark eye positions on the horizontal center line, leaving one eye width between them.
2. Mark the nose base halfway between the eye line and the bottom of the circle.
3. Mark the mouth line one-third of the way from the nose base to the bottom of the circle.
4. Draw ear shapes from the eye line down to the nose base on both sides.

Tilting the grid for perspective

To tilt the head, rotate the entire grid (circle, vertical line, horizontal line) by the tilt angle. For a tilt to the left, rotate the grid counterclockwise. For a tilt to the right, rotate it clockwise. The features rotate with the grid, so the eye line stays perpendicular to the vertical center line.

After rotating, place features using the same proportions along the rotated lines. The eye line is still the horizontal center line of the rotated grid. The nose base and mouth line are measured along the rotated vertical line. This keeps features consistent with the head's orientation.

1. Draw a circle and center lines as before.
2. Choose a tilt angle, for example 20 degrees (hypothetical example).
3. Rotate the entire grid by the tilt angle around the circle's center.
4. Place eyes on the rotated horizontal line, nose and mouth along the rotated vertical line, and ears parallel to the rotated vertical line.

Checking alignment and proportion

Check that the vertical center line passes through the nose bridge and the middle of the mouth. Check that the eye line passes through both eye centers. On a tilted head, the eye line should be perpendicular to the vertical center line. Measure distances along the rotated lines, not along the page edges.

Use a simple arithmetic check: if the circle diameter is 8 cm, the radius is 4 cm. The eye line is at the center, so the distance from the top of the circle to the eye line is 4 cm, and from the eye line to the bottom is 4 cm. The nose base is 2 cm below the eye line. The distance from the nose base to the bottom is 2 cm; one-third of that is about 0.67 cm, so the mouth line is about 2.67 cm below the eye line. These values are hypothetical examples; adjust to your drawing size.

1. Verify the vertical center line bisects the nose and mouth.
2. Verify the eye line passes through both eye centers and is perpendicular to the vertical line.
3. Measure the distance from the top of the circle to the eye line and compare with the distance from the eye line to the bottom.
4. Check that the nose base is halfway between the eye line and the bottom of the circle along the vertical line.

Worked example

Construct an upright face using a circle of diameter 8 cm. Place the eye line at the center, the nose base halfway between the eye line and the bottom of the circle, and the mouth line one-third of the way from the nose base to the bottom. Describe the positions in centimeters from the eye line.

Four practice exercises

Common mistakes

• Drawing features parallel to the page edges instead of the tilted grid. Rotate the feature placement lines with the grid. Eyes, nose, and mouth should follow the rotated center lines, not the horizontal and vertical edges of the paper.
• Placing the eye line at the top of the circle instead of the center. The horizontal center line passes through the circle's center. Measure from the top and bottom of the circle to confirm the line is centered.
• Making the nose base too high or too low. Mark the nose base halfway between the eye line and the bottom of the circle along the vertical center line. Measure both distances to check.
• Forgetting to keep the vertical and horizontal center lines perpendicular after tilting. Use a right-angle check or a corner of a sheet of paper to confirm the two center lines meet at 90 degrees after rotation.

Self-check rubric

• Circle is drawn lightly and center lines pass through the center.
• Vertical and horizontal center lines are perpendicular before tilting.
• Features are placed using the center lines, not the page edges.
• On tilted heads, the entire grid is rotated and features follow the rotated lines.
• Eye line passes through both eye centers; nose and mouth lie on the vertical center line.
• Proportions along the rotated lines match the upright proportions.
• Valid alternative conventions are accepted if consistently applied and explained.

Questions and answers