Key Takeaways
- Differences between thigh modifiers (thick/toned/plump/slender) are small. The difference from control (no modifier) is detectable, but differences among thick/toned/plump are subtle and hard to distinguish without same-seed comparison.
- slender thighs shows the most visible effect. Legs appear thinner and longer, with a relatively clear difference from control.
- thick thighs and plump thighs produce nearly identical results. Both add slight volume to the thighs, but the change is not dramatic.
- toned thighs is nearly identical to control. The intended muscle definition was not visually confirmed in any of the 3 samples.
- Body type modifications align with findings from the body-type-control-test article. With photorealistic models, body type modifier effects are limited.
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 |
Base Prompt
1girl, 32yo japanese actress, {THIGH_TYPE}, wearing black mini skirt and white crop top, standing, facing camera, full body, simple white background, soft studio lighting
| Condition | THIGH_TYPE |
|---|
| A00: Control | (none) |
| A01: thick | thick thighs |
| A02: toned | toned thighs |
| A03: plump | plump thighs |
| A04: slender | slender thighs |
Evaluation Criteria
- Thigh thickness: Whether thickness changes compared to control
- Leg silhouette: Impact on overall proportions
- Muscle/softness: Texture difference between toned (firm) and plump (soft)
Testing Each Condition
A00: Control (No Modifier)
1girl, 32yo japanese actress, wearing black mini skirt and white crop top, standing, facing camera, full body, simple white background, soft studio lighting
Observations: Full body composition in black mini skirt and white crop top. Thighs are average thickness — neither particularly thick nor thin. Seed 2 shows a center full-body with surrounding bust-up shots (a seed characteristic). Thigh exposure from the mini skirt is consistently reproduced.
A01: thick thighs
1girl, 32yo japanese actress, thick thighs, wearing black mini skirt and white crop top, standing, facing camera, full body, simple white background, soft studio lighting
Observations: Thigh volume is slightly increased compared to control. Particularly in seed 2’s center image, the thigh width is wider with more volume at the skirt boundary. However, the change is not dramatic — more like “slightly thicker.”
A02: toned thighs
1girl, 32yo japanese actress, toned thighs, wearing black mini skirt and white crop top, standing, facing camera, full body, simple white background, soft studio lighting
Observations: The smallest difference from control. The intended “toned” impression was not confirmed — no clear muscle definition or firmness was visible in 3/3 samples. The effect of toned thighs is difficult to reproduce with z-image-turbo.
A03: plump thighs
1girl, 32yo japanese actress, plump thighs, wearing black mini skirt and white crop top, standing, facing camera, full body, simple white background, soft studio lighting
Observations: Slightly increased volume comparable to thick thighs. No texture difference between plump (soft) and thick (heavy) was observed. In seed 2, outfit variations including V-cut and sports bra appeared in the surrounding panels as a side effect.
A04: slender thighs
1girl, 32yo japanese actress, slender thighs, wearing black mini skirt and white crop top, standing, facing camera, full body, simple white background, soft studio lighting
Observations: The most clear difference from control among all 5 conditions. Thighs appear thinner and legs look longer overall in 3/3 samples. Slender has a relatively strong pull toward “thin/delicate.”
Note: thick thighs has a weak effect, while slender produces a visibly stronger effect — an asymmetric result between the two directions.
Comparison Summary
| Modifier | Effect Strength | Thickness Direction | Difference from Control |
|---|
| thick thighs | Weak | Slightly thicker | Minimal |
| toned thighs | Almost none | No change | Undetectable |
| plump thighs | Weak | Slightly thicker | Minimal (same as thick) |
| slender thighs | Medium | Thinner | Relatively clear |
Practical Tips
- To make thighs thicker: Use
thick thighs but effect is limited. May need to combine with curvy body or wide hips for overall body type change (untested) - To make thighs thinner:
slender thighs is effective - Body type modifier limitations: z-image-turbo’s subject standard (32yo japanese actress) tends to converge on a specific body type range, making extreme body changes difficult. This aligns with findings from the body type test article
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