Conclusions
- Swimsuit types (one-piece, bikini, tankini, etc.) were correctly distinguished in all conditions. Color specifications (navy, terracotta orange, mustard yellow, etc.) were also stably reflected in 3 out of 3 images
- Scene/environment description reproduction was excellent. Beach resort palm trees and emerald green sea, pool water surface reflected light, rocky shore with white wave spray, lakeside wooden deck with mountain reflections, sunset gradient sky, and public pool lane ropes with starting blocks were each stably generated
- Bikini × pareo sunset beach had the best lighting expression. Orange-to-pink gradient sky, shoreline silhouette, and hair rim lighting were reproduced in 3/3
- Rash guard layered composition was stable. White rash guard with turquoise blue bikini top visible underneath was reproduced in 3/3
- Tankini separates were improved with
two-piece+separate crop top and high-waist bottomspecification. 1/3 separate reproduction in Condition D improved to 3/3 in Condition G - Rim light + backlit specification is effective even in non-sunset scenes. Condition H added
golden rim light on hairandbacklitto a daytime beach resort — gold rim lighting on hair outlines was confirmed
What You’ll Learn
- Reproduction accuracy of swimsuit design (color, shape, details)
- Stability of scene-specific environment and lighting
- Composition patterns for swimsuit fashion prompts
Experiment Conditions
| Parameter | Value |
|---|---|
| Model | z-image-turbo |
| Steps | 8 |
| CFG | 1.0 |
| Image Size | 1024x1024 |
| Seeds | 3 fixed seeds: 42, 123, 789 |
| Variable | Swimsuit × Scene (control + 8 conditions) |
Subject common to all prompts: 1girl, 32yo japanese actress
Control: Simple Swimsuit
| seed 42 | seed 123 | seed 789 |
|---|---|---|
 |  |  |
Observation: Seed 42 shows a navy one-piece at a rocky beach — full body composition. Seed 123 similarly shows a navy one-piece against a rocky background. Seed 789 changes to a navy bikini on a sandy beach — full body visible. swimsuit alone tends toward one-piece (2/3) but bikini also appears. Without scene specification, beach details vary.
Condition A: Navy One-Piece × Beach Resort
| seed 42 | seed 123 | seed 789 |
|---|---|---|
 |  |  |
Observation: Navy one-piece generated in 3/3. White sand beach, emerald green sea, and palm tree silhouettes confirmed in all images — resort background is stable. Seed 42 has thin-strap design, seed 123 has a sporty scoop neck, seed 789 also one-piece with slightly different styling. Navy coloring is consistent across 3/3.
Condition B: Rash Guard × Poolside
| seed 42 | seed 123 | seed 789 |
|---|---|---|
 |  |  |
Observation: White rash guard with turquoise blue bikini top combo reproduced in 3/3. Rash guard is open in front with the bikini top peeking through — stable composition. Sparkling pool water surface reflected light depicted in 3/3. Seed 42 shows feet in the pool, seed 123 holds a pool ladder, seed 789 is similarly at the pool edge. Navy swim shorts also confirmed.
Condition C: Hibiscus Print × Rocky Shore
| seed 42 | seed 123 | seed 789 |
|---|---|---|
 |  |  |
Observation: White base with blue hibiscus pattern one-piece generated in 3/3. Pattern reproduction quality is high — hibiscus shapes are clearly identifiable. Halter neck straps confirmed in 3/3. Rocky shore background with white wave spray is stably depicted in 3/3. Summer cumulonimbus clouds visible in the sky. The wave spray hitting rocks conveys dynamic coastal energy.
Condition D: Terracotta Tankini × Lakeside
| seed 42 | seed 123 | seed 789 |
|---|---|---|
 |  |  |
Observation: Terracotta orange swimwear generated in 3/3. Tankini (separate top) confirmed in 1/3 (seed 42) — the other 2 images produced a near-one-piece silhouette. However, color is consistent terracotta orange throughout. Lakeside wooden deck, quiet lake reflecting mountains and green forest are stably depicted in 3/3. Morning soft light is also reflected.
Condition E: Bikini × Pareo × Sunset
| seed 42 | seed 123 | seed 789 |
|---|---|---|
 |  |  |
Observation: Black bikini top with white sheer pareo combo reproduced in 3/3. Sunset depiction is particularly excellent — orange-to-pink gradient sky and shoreline silhouette confirmed in 3/3. Pareo’s sheer fabric texture is well-depicted in 3/3 with wind-billowing effect. Hair rim lighting in backlit conditions also confirmed in 3/3.
Condition F: Mustard Yellow × Public Pool
| seed 42 | seed 123 | seed 789 |
|---|---|---|
 |  |  |
Observation: Mustard yellow one-piece generated in 3/3. Square neck mostly reflected. Public pool environment depicts lane ropes (red/blue/yellow), starting blocks, and pool water reflections in 3/3. Thick shoulder straps reflected in 3/3.
Condition G: Tankini Explicit Separates (Improved Version of Condition D)
As a countermeasure to Condition D’s weak separate representation, explicitly specifying two-piece tankini and separate crop top and high-waist bottom. Also changed shooting composition to knee-up shot.
| seed 42 | seed 123 | seed 789 |
|---|---|---|
 |  |  |
Observation: Seed 42 clearly shows terracotta orange crop top and high-waist bottom as separate pieces — skin visible between top and bottom. The problem of going toward one-piece in Condition D was improved by adding two-piece tankini and separate crop top and high-waist bottom. Lakeside wooden deck with mountain reflections in quiet lake also stably depicted. Morning soft light confirmed.
Condition H: Rim Light Addition (Improved Version of Condition A)
Applying the excellent rim light from Condition E (pareo × sunset) to Condition A (navy one-piece × beach resort). Added golden rim light on hair and backlit.
| seed 42 | seed 123 | seed 789 |
|---|---|---|
 |  |  |
Observation: Seed 42 shows navy one-piece with white sand beach and emerald green sea with palm trees in the background. Compared to Condition A, the addition of backlit and golden rim light on hair creates gold rim lighting on hair outlines — adding a backlit silhouette feel. While Condition A bathed the subject in even frontal summer light, Condition H uses backlighting to make the subject’s outline stand out with a more three-dimensional depiction.
Comparison Summary
Swimsuit Design Reproduction
| Condition | Swimsuit Type | Color | Shape | Notes |
|---|---|---|---|---|
| A | Navy one-piece | 3/3 | 3/3 | Stable |
| B | Rash guard + bikini | 3/3 | 3/3 | Layered composition stable |
| C | Hibiscus print one-piece | 3/3 | 3/3 | High pattern accuracy |
| D | Terracotta tankini | 3/3 | 1/3 | Separate feel unstable |
| E | Bikini + pareo | 3/3 | 3/3 | Sheer texture present |
| F | Mustard yellow one-piece | 3/3 | 3/3 | Square neck reproduced |
| G | Terracotta tankini improved | 3/3 | 3/3 | Separate feel improved |
| H | Navy one-piece + rim light | 3/3 | 3/3 | Backlit rim lighting adds depth |
Environment Description Accuracy
| Condition | Scene | Key Environment Elements | Reproduction |
|---|---|---|---|
| A | Beach resort | Palm trees, white sand, emerald sea | 3/3 |
| B | Hotel poolside | Water reflections, deck chairs | 3/3 |
| C | Rocky seaside shore | Rocks, wave spray, cumulonimbus | 3/3 |
| D | Lakeside wood deck | Lake surface, mountain reflection, deck | 3/3 |
| E | Sunset beach | Sunset gradient, rim light | 3/3 |
| F | Public pool | Lane ropes, starting blocks | 3/3 |
| G | Lakeside wood deck | Lake surface, mountain reflection, deck | 3/3 |
| H | Beach resort (backlit) | Palm trees, white sand, rim light | 3/3 |
Note: The main takeaway here is that color specification was stable at 3/3 across all conditions. Condition G’s
separate crop top and high-waist bottomfixing the separate issue, and Condition H’s rim light working on daytime scenes beyond just sunset — both worth keeping in mind.
