Conclusions First
To produce skeleton wave characteristics (thin upper body, wide hips, lower-body-heavy pear shape), wide hips and pear shape were the most effective. Increased hip volume and contrast with the upper body were confirmed. hourglass also showed effects on waist definition and hip projection, but it also increased upper body bust volume — different from skeleton wave’s “thin upper body.” wave body, soft curves, soft texture, and thin upper showed little to no difference from control.
Experiment Design
| Parameter | Value |
|---|---|
| Model | z-image-turbo (6B, photorealistic distilled) |
| Steps | 8 |
| Sampler | euler |
| Scheduler | ddim_uniform |
| CFG | 1.0 |
| Size | 1024x1024 |
| Seeds | 3 fixed (consistent across all conditions) |
| Per condition | 3 images (3 seeds) |
| Total | 8 conditions = 24 images |
Base Prompt
White background + tank top + jeans standardized to clearly observe body silhouette.
A00: control
| seed 1 | seed 2 | seed 3 |
|---|---|---|
 |  |  |
Observation: Seed 1 is standard build with gentle waist curve — balanced upper/lower proportions. Seed 2 is slim with small hips. Seed 3 is also slender with no upper/lower imbalance. None of the 3 are lower-body-heavy.
A01: wave body
| seed 1 | seed 2 | seed 3 |
|---|---|---|
 |  |  |
Observation: Seed 2 makes any bust change hard to judge compared to control — hip/lower body balance shows no change. Seed 1 has a changed leg pose (walking-like stance) making body type change hard to evaluate. The lower-body-heavy characteristic of skeleton wave is not confirmed.
A02: soft curves
| seed 1 | seed 2 | seed 3 |
|---|---|---|
 |  |  |
Observation: No difference from control. Seed 2 shows the same slim build with no change in waist definition or hip expansion. “Soft curves” lacks the impact to significantly change body type.
A03: pear shape
| seed 1 | seed 2 | seed 3 |
|---|---|---|
 |  |  |
Observation: Clear change compared to control in seed 1. Hip and thigh volume increases relative to the upper body — upper body keeps narrow shoulders while lower body flares out. Jeans fit snugly at the thighs with a pear-shaped silhouette. Seed 2 also shows more hip volume compared to shoulders — a lower-body-heavy body type. Close to skeleton wave’s “lower-body-heavy” characteristics.
A04: thin upper
| seed 1 | seed 2 | seed 3 |
|---|---|---|
 |  |  |
Observation: Seed 1 shows more visible collarbone and slightly thinner upper body, but the difference from control is small. Seed 2 shows the same body type as control. “Thin upper” intends to slim the upper body but the effect is limited and inconsistent.
A05: hourglass
| seed 1 | seed 2 | seed 3 |
|---|---|---|
 |  |  |
Observation: Seed 1 generated 2 people (composition disruption). Seed 2 shows more waist definition and hip projection compared to control, but bust volume also increased — creating an “hourglass” figure with volume both top and bottom. Not skeleton wave’s “thin upper body + full lower body” but rather full volume in both upper and lower body.
A06: soft texture
| seed 1 | seed 2 | seed 3 |
|---|---|---|
 |  |  |
Observation: No difference from control. Seed 2 shows the same slim build with no change. “Soft texture” is a texture description — no body type effect confirmed.
A07: wide hips
| seed 1 | seed 2 | seed 3 |
|---|---|---|
 |  |  |
Observation: Seed 1 clearly shows increased hip and thigh volume compared to control. Jeans fit snugly at thighs and hips with wider hip-to-waist ratio. Seed 2 also shows more hip volume with the lower body prominently weighted against the upper body. Like pear shape, this successfully reproduces skeleton wave’s “lower-body-heavy” characteristic.
Summary
| Condition | Body Change | Side Effects |
|---|---|---|
| wave body | No difference | Pose change |
| soft curves | No difference | None |
| pear shape | Lower body volume increase, pear-shaped | None |
| thin upper | Minor (inconsistent) | None |
| hourglass | Waist definition + volume top and bottom | Upper body also enlarges / composition disruption |
| soft texture | No difference | None |
| wide hips | Hip expansion, lower-body-heavy | None |
To produce skeleton wave characteristics, wide hips or pear shape are effective. Both stably achieve hip and thigh volume increase, creating a lower-body-heavy physique in contrast with the upper body.
hourglass does define the waist but also increases upper body volume — not suited for skeleton wave’s “thin upper body.” To reproduce all skeleton wave characteristics (thin upper body + soft curves + lower-body-heavy), combining wide hips with thin upper body or slim upper body would be a viable approach.
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