Key Takeaways
thong bikinihas the highest buttock exposure. T-back style bikini reproduced in 3/3, with nearly full buttock visibility.high-cut black bikini bottomcreates a sharp V-cut line with more leg-crease exposure than standard bikini.bikini wedgieis unstable for reproducing the “wedgie” effect. Difference from normal bikini is minimal in most cases.from behindwith beach background has high composition stability. Solo compositions with sand and rocks are placed naturally.
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) |
| Per condition | 3 images (3 seeds) |
| Total | 4 conditions × 3 = 12 images |
Results by Condition
A00: Normal Bikini Rear View
Prompt
1girl, 32yo japanese actress, wearing black bikini, standing, from behind, full body, beach background, bright sunlight
| seed 1 | seed 2 | seed 3 |
|---|---|---|
 |  |  |
Observations: Standard bikini rear view. Lower half of the buttocks is covered.
A01: Wedgie
Prompt
1girl, 32yo japanese actress, wearing black bikini, bikini wedgie, tight fit, standing, from behind, full body, beach background, bright sunlight
| seed 1 | seed 2 | seed 3 |
|---|---|---|
 |  |  |
Observations: The bikini wedgie effect is unstable. Difference from normal bikini is minimal, with clear wedgie expression in only about 1/3.
A02: High-Cut
Prompt
1girl, 32yo japanese actress, wearing high-cut black bikini bottom, standing, from behind, full body, beach background, bright sunlight
| seed 1 | seed 2 | seed 3 |
|---|---|---|
 |  |  |
Observations: 2/3 reproduced a V-cut high-cut bikini. The cut line at the leg crease is higher, with slightly more buttock exposure than the normal bikini.
A03: Thong Bikini
Prompt
1girl, 32yo japanese actress, wearing black thong bikini, standing, from behind, full body, beach background, bright sunlight
| seed 1 | seed 2 | seed 3 |
|---|---|---|
 |  |  |
Observations: 3/3 reproduced a T-back style bikini. Nearly full buttock exposure with a visible V-line string from waist to crotch. Clearly different cut line from normal bikini and high-cut.
Lab Director: Thong bikini reproduction rate is solid. The combo with a beach background keeps it looking natural.
Comparison Summary
| Type | Buttock Exposure | Cut Line | Reproduction Rate |
|---|---|---|---|
| normal bikini | Low | Horizontal | 3/3 |
| wedgie | Low-Medium | Unstable | 1/3 |
| high-cut | Medium | V-cut | 2/3 |
| thong | Highest | T-back | 3/3 |
Practical Tips
- Cut line control:
thong>high-cut> normal, in order of increasing buttock exposure - Wedgie is not recommended – effect is unstable. Use thong or high-cut instead for reliable results
from behind+ beach is the go-to composition for rear-view bikini shots
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