Key Takeaways
- Bra type specification is highly effective, with each type producing clearly distinct designs. Compared to body modifiers (like thick thighs), outfit type specification shows much higher model comprehension.
- push-up bra: Underwired push-up style. Cleavage is emphasized with thin straps. The most orthodox design.
- lace bralette: Triangle-cup lace bralette. Delicate lace patterns reproduced well, with a soft wireless form.
- sports bra: Wide band and round neckline. Fitness vibe. No cleavage.
- strapless bra: Strapless bandeau type. Shoulders fully exposed.
- white lace full-cup bra: Large cups with heavy lace decoration. The most ornate and elegant design.
Experiment Design
| Parameter | Value |
|---|
| Model | z-image-turbo |
| Seeds | 3 fixed |
| Background | bedroom, warm lighting |
| Total | 5 conditions x 3 = 15 images |
Conditions
| Condition | Bra Type |
|---|
| A00 | black push-up bra |
| A01 | lace bralette |
| A02 | sports bra |
| A03 | strapless bra |
| A04 | white lace full-cup bra |
Common base: 1girl, 32yo japanese actress, wearing [BRA_TYPE], standing, facing camera, upper body, bedroom, warm lighting
Results by Condition
A00: Push-Up Bra
1girl, 32yo japanese actress, wearing black push-up bra, standing, facing camera, upper body, bedroom, warm lighting
Observations: 3/3 produced a black underwired push-up bra. Cleavage is pushed up with thin straps. Cup shape shows solid molded cups with a structured, supportive look. Bedroom background with zero text artifacts.
A01: Lace Bralette
1girl, 32yo japanese actress, wearing lace bralette, standing, facing camera, upper body, bedroom, warm lighting
Observations: 3/3 produced a lace bralette. Triangle cup design with delicate floral lace patterns. Compared to the push-up, the cups have less structure, following the body’s contour in a soft form. Color tends toward pink to white.
A02: Sports Bra
1girl, 32yo japanese actress, wearing sports bra, standing, facing camera, upper body, bedroom, warm lighting
Observations: 3/3 produced a wide-band sports bra. Round or scoop neckline with a flat, compression-style silhouette. Cleavage is not emphasized, maintaining a fitness-wear design. There’s a slight mismatch with the bedroom background, but the bra reproduction itself is accurate.
A03: Strapless Bra
1girl, 32yo japanese actress, wearing strapless bra, standing, facing camera, upper body, bedroom, warm lighting
Observations: 2/3 produced a strapless bandeau-style bra. Shoulders are fully exposed, showing a clean line from the collarbone to the shoulders. It looks close to a tube top, but the cup shape is recognizable as a bra.
A04: White Lace Full-Cup Bra
1girl, 32yo japanese actress, wearing white lace full-cup bra, standing, facing camera, upper body, bedroom, warm lighting
Observations: 3/3 produced a white lace full-cup bra. Compared to the bralette (A01), the cups are larger with more lace decoration. Delicate scalloped lace patterns are finely rendered, making this the most “lingerie-like” in ornamental quality. Strap thickness varies from thin bralette-style to thicker underwired-bra style.
Comparison Summary
| Bra Type | Cup Shape | Material Feel | Cleavage | Vibe |
|---|
| push-up bra | Structured, molded | Matte | Strong | Glamorous |
| lace bralette | Triangle, soft | Lace | Natural | Feminine |
| sports bra | Flat, compression | Technical | None | Sporty |
| strapless bra | Bandeau | Matte | Medium | Clean |
| lace full-cup bra | Large cups | Lace | Medium-strong | Elegant |
Practical Tips
Recommended by Use Case
- Allure focus –
lace bralette – delicate lace, most feminine - Cleavage emphasis –
push-up bra – reliable push-up effect - Sports / healthy –
sports bra – wholesome, athletic vibe - Bare shoulders –
strapless bra – ideal paired with shoulder/collarbone exposure - Ornate lingerie –
white lace full-cup bra – most decorative and elegant
Bedroom Background Effect
Across all 5 conditions x 3 seeds = 15 images, zero text artifacts appeared. Consistent with the open shirt test findings, the bedroom background continues to suppress text artifact contamination in lingerie-type prompts.
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