Key Takeaways
- Body type modifiers (narrow waist, hourglass, wide hips) have limited effect. From a front-facing composition, the difference from control is small, with no dramatic waist or hip changes observed.
- Side angle (
from side) shows hip curves most effectively. The combination ofpronounced hip curve, slim waist, from sideproduced a clearly visible S-line from waist to hip. - Fitted black dress is the most effective outfit for emphasizing body lines. A body-hugging black dress naturally accentuates the waist-hip contrast.
- Changing the angle and outfit is more effective than changing body type descriptors. This follows the same pattern as the thigh descriptor test.
Experiment Design
| Parameter | Value |
|---|---|
| Model | z-image-turbo (6B, photorealistic distilled) |
| Steps | 8 |
| CFG | 1.0 |
| Size | 1024x1024 |
| Seeds | 3 fixed (shared across all conditions) |
| Framing | full body |
| Per condition | 3 images (3 seeds) |
| Total | 5 conditions x 3 = 15 images |
Condition Design
| Condition | Body Type Modifier | Angle |
|---|---|---|
| A00: Control | (none) | facing camera |
| A01: narrow waist | narrow waist | facing camera |
| A02: hourglass | hourglass figure | facing camera |
| A03: wide hips | wide hips | facing camera |
| A04: hip curve (side) | pronounced hip curve, slim waist | from side |
Common base: wearing fitted black dress, standing, full body, simple white background, soft studio lighting
Testing Each Condition
A00: Control
| seed 1 | seed 2 | seed 3 |
|---|---|---|
 |  |  |
Observations: The fitted black dress follows the body line creating a natural silhouette. Waist cinching is lightly expressed through the dress silhouette but is not particularly emphasized. Knee-length sheath dresses are consistently reproduced.
A01: narrow waist
| seed 1 | seed 2 | seed 3 |
|---|---|---|
 |  |  |
Observations: The difference from control is minimal. There’s a possibility that narrow waist made the waist slightly thinner, but it’s within the range of seed-to-seed variation.
A02: hourglass figure
| seed 1 | seed 2 | seed 3 |
|---|---|---|
 |  |  |
Observations: In seed 2’s three-panel composition, the dress fit appears slightly more emphasized than control. There may be a slight change in the waist-hip ratio, but it can’t be called a definitive “hourglass figure.”
A03: wide hips
| seed 1 | seed 2 | seed 3 |
|---|---|---|
 |  |  |
Observations: Like narrow waist and hourglass, the frontal difference is minimal. The wide hips effect is difficult to confirm.
A04: hip curve (Side Angle)
| seed 1 | seed 2 | seed 3 |
|---|---|---|
 |  |  |
Observations: The from side angle effectively showcases the body’s S-curve. In seed 2’s three-panel layout, front, side, and rear-diagonal angles are all captured, with the line from waist to hip to buttocks clearly visible. Changing the angle is far more effective than body type modifiers.
Comparison Summary
| Condition | Waist Effect | Hip Effect | Angle Contribution |
|---|---|---|---|
| Control | Natural dress-driven line | Standard | Front |
| narrow waist | Minimal | None | Front |
| hourglass | Minimal | Minimal | Front |
| wide hips | None | Minimal | Front |
| hip curve + from side | — | Clear | Side is most effective |
Practical Tips
- To emphasize waist and hips, use
from sideangle. More effective than body type modifiers - A fitted dress (body-hugging outfit) is a prerequisite for showing body lines. With loose clothing, body type modifiers become even less visible
- Body type modifiers are limited. z-image-turbo’s subject standard makes extreme body changes difficult
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