| name | fabric-on-body |
| description | 一键替换服装面料。版式图 + 面料图 → 换上新面料的样衣图,垂坠与光泽随材质变。当用户说「换面料」「换材质」「试布料」「面料上身」「同款不同料」时使用。 |
fabric-on-body — 一键替换服装面料
版型不动,面料换掉。给一张服装版式图 + 一张面料小样,输出这个版型用新面料做出来的样衣效果图。
价值在打样前:一个版型试 8 种面料,传统做法是打 8 件样衣(每件几天、几百块);这里是 8 次生成。
生成效果示例
| 输入:服装版式图 | 输入:面料图 |
|---|
 |  |
style-sheet.jpg — 落肩宽松圆领毛衣版型,800×800 | fabric-swatch.jpg — 象牙白真丝缎面小样,640×640 |
实际执行的命令:
dlazy gpt-image-2 \
--prompt 'Fabric replacement for a garment style sheet. Image 1 is the garment pattern/style reference: an oversized drop-shoulder crewneck sweater with ribbed collar, cuffs and hem. Image 2 is the target fabric: ivory silk satin with a soft lustrous sheen and fine weave. Re-render the exact same garment silhouette from image 1 in the fabric from image 2. Keep the pattern identical: same oversized drop-shoulder cut, same body length, same sleeve length, same collar/cuff/hem construction, same flat-lay layout and camera angle. Replace only the material — the sweater must now read as ivory silk satin with specular highlights on the folds and soft drape instead of chunky knit. Clean white background, even studio light, no text.' \
--images docs/fabric-on-body/style-sheet.jpg docs/fabric-on-body/fabric-swatch.jpg \
--size 1024x1024 --quality medium --imageFormat jpeg \
--save docs/fabric-on-body/example-output.jpg
输出
example-output.jpg — 1024×1024。落肩剪裁、身长袖长、罗纹领口袖口下摆的结构与平铺角度都与版式图一致;材质从粗针织变成象牙白真丝缎面,褶皱上出现高光、垂坠变得柔顺,罗纹部位仍以缎面质感保留。
1、能力边界
| 输入 | 说明 |
|---|
| 服装版式图 | 决定版型、剪裁、结构与拍摄角度 |
| 面料图 | 决定材质、纹理、光泽与垂坠感(面料小样特写最佳) |
| 服装类型 | 帮助模型理解结构(上装 / 下装 / 连衣裙 / 外套 / 内衣) |
| 保持不变 | 会改变 |
|---|
| 版型与剪裁、身长袖长、领口/袖口/下摆结构、缝线位置、拍摄角度与构图 | 材质与织法、表面光泽、垂坠与褶皱形态、厚度观感 |
不做:不改版型比例;不改变服装的结构设计;不承诺真实打样的手感与克重——输出是视觉预览,不是工艺样衣。
2、输入素材规则
生成前先自检这几条硬性约束:
- 大小:20KB ~ 15MB
- 分辨率:大于 400×400
- 格式:jpg / jpeg / png / webp
版式图(✅):纯色背景、结构清晰、正面完整的平铺图或人台图。
面料图(✅):面料小样特写,能看清织纹与光泽;有褶皱转折更好(能交代垂坠)。
会明显拉低效果的输入(❌)
| 问题 | 说明 |
|---|
| 面料图拍太远 | 看不清织纹,只会当成一块纯色 |
| 面料图带强环境色 | 黄光下拍的白布会换成米黄色 |
| 版式图有复杂印花 | 原印花会和新面料打架,先用 item-repair 或换素图 |
| 面料与品类不匹配 | 硬挺牛仔布做不出吊带裙的垂坠,模型会硬凑 |
3、面料替换的关键:写清「材质带来的物理变化」
只说「换成真丝」不够——模型不知道该怎么改光影。要把材质翻译成可画出来的物理特征:
| 面料 | 要写的物理特征 |
|---|
| 真丝 / 缎面 | lustrous specular highlights along the folds, fluid drape, soft continuous gradients |
| 粗针织 | chunky knit loops with visible yarn twist, matte fibre halo, structured heavy drape |
| 牛仔 | twill diagonal weave, slight slub texture, stiff drape with sharp fold creases |
| 灯芯绒 | vertical wale ridges catching light, matte pile, medium-stiff drape |
| 雪纺 | semi-sheer, very light drape with many fine ripples, soft diffused light through the fabric |
| 皮革 | low-frequency specular sheen, grain texture, stiff drape with broad soft creases |
| 摇粒绒 | dense short pile, fuzzy silhouette edge, no specular highlight |
再加一句「版型不许动」——这是本技能最容易失守的地方:
Keep the pattern identical: same cut, same body length, same sleeve length,
same collar/cuff/hem construction, same flat-lay layout and camera angle.
Replace only the material.
4、工具调用
本技能使用 dLazy 的 gpt-image-2(图像编辑模型;面料替换要求「几何完全不动、材质完全改变」,是典型的定向属性替换任务)。
调用方式
两种等价写法,选一种。统一入口会自动选后端、失败重试、建目录落盘、估算成本:
node scripts/gen.mjs --task fabric-on-body \
--prompt '<见下方 Prompt 模板>' \
--images <按下表顺序> \
--save output/fabric-on-body-<sku>.jpg
dlazy gpt-image-2 --prompt '...' --images ... --save output/fabric-on-body.jpg
参数约定(本技能固定用法)
| 参数 | 取值 | 理由 |
|---|
--images | [版式图, 面料图] | 顺序即 prompt 中的 image 1 / 2 |
--size | 与版式图比例一致(1024x1024 平铺 / 1024x1536 人台竖版) | 换料不该改构图 |
--quality | high | 材质是本技能的唯一产出,必须 high |
--imageFormat | jpeg | 通用格式 |
--batch | 2 ~ 3 | 垂坠形态有随机性 |
--save | docs/fabric-on-body/output-<版型>-<面料>.jpg | 版型 × 面料矩阵命名 |
Command Examples
dlazy gpt-image-2 \
--prompt 'Fabric replacement. Image 1 is the garment pattern reference, image 2 is the target fabric. Re-render the exact same garment silhouette from image 1 in the fabric from image 2. Keep the pattern identical: same cut, body length, sleeve length, collar/cuff/hem construction, layout and camera angle. Replace only the material. Clean white background, even studio light, no text.' \
--images docs/fabric-on-body/style-sheet.jpg docs/fabric-on-body/fabric-swatch.jpg \
--size 1024x1024 --quality high
STYLE=docs/fabric-on-body/style-sheet.jpg
KEEP='Keep the pattern identical: same oversized drop-shoulder cut, same body length, same sleeve length, same collar/cuff/hem construction, same flat-lay layout and camera angle. Replace only the material.'
for F in satin corduroy denim fleece; do
case $F in
satin) PHYS='lustrous specular highlights along the folds, fluid drape, soft continuous gradients' ;;
corduroy) PHYS='vertical wale ridges catching light, matte pile, medium-stiff drape' ;;
denim) PHYS='twill diagonal weave, slight slub texture, stiff drape with sharp fold creases' ;;
fleece) PHYS='dense short pile, fuzzy silhouette edge, no specular highlight' ;;
esac
dlazy gpt-image-2 \
--prompt "Fabric replacement for a garment style sheet. Image 1 is the garment pattern/style reference. Image 2 is the target fabric. Re-render the exact same garment silhouette from image 1 in the fabric from image 2. $KEEP The garment must now read as $F: $PHYS. Clean white background, even studio light, no text." \
--images "$STYLE" "docs/fabric-on-body/swatch-$F.jpg" \
--size 1024x1024 --quality high --imageFormat jpeg \
--save "docs/fabric-on-body/output-drop-shoulder-$F.jpg"
done
dlazy gpt-image-2 --dry-run --prompt --images a.jpg b.jpg --size 1024x1024 --quality high
延伸阅读
5、Prompt 模板
Fabric replacement for a garment style sheet.
Image 1 is the garment pattern/style reference: [品类 + 版型描述].
Image 2 is the target fabric: [面料名 + 颜色 + 光泽描述].
Re-render the exact same garment silhouette from image 1 in the fabric from image 2.
Keep the pattern identical: same [剪裁], same body length, same sleeve length,
same [领口/袖口/下摆结构], same [缝线位置], same layout and camera angle.
Replace only the material — the garment must now read as [面料名]:
[第三节表格里对应的物理特征].
Clean [背景色] background, even studio light, no text.
按问题追加的修正句
| 问题 | 追加到 prompt 末尾 |
|---|
| 版型跟着变了 | The silhouette outline must be pixel-aligned with image 1. Only surface material may differ. |
| 面料颜色偏了 | Sample the fabric colour from image 2 under neutral light; do not shift hue or add colour cast. |
| 换完还是原来的质感 | 把物理特征写得更极端,并追加 The original [原面料] texture must be completely gone. |
| 垂坠不对 | Drape stiffness: [very fluid / medium / stiff]. Fold count and fold radius must match a [面料] of about [克重] gsm. |
| 缝线/罗纹消失了 | Preserve construction details: [罗纹/明线/拉链] must remain visible in the new material. |
6、执行流程
- 备素材:版式图(结构清晰、印花越少越好)+ 面料小样特写(能看清织纹)。
- 翻译材质:查第三节表格,把面料名换成物理特征描述。
- 写版型锁定句:剪裁 / 身长 / 袖长 / 领口袖口下摆 / 缝线 / 角度,逐项写死。
--quality high 起跑,比例跟随版式图。
- 要做选型矩阵:用第四节循环,一个版型 × N 种面料。
- 质检:版型轮廓是否与原图对齐、面料颜色是否准、质感是否真的换掉了、缝线罗纹是否还在。
- 交付时注明这是视觉预览,不代表真实手感与克重。
7、常见问题
| 现象 | 原因 | 处理 |
|---|
| 版型变了 | 未锁定轮廓 | 追加 silhouette outline must be pixel-aligned with image 1 |
| 面料颜色不对 | 面料图带环境色 | 重拍面料小样(中性光),或追加取色约束句 |
| 质感没换掉 | 物理特征写得太弱 | 用第三节表格的极端描述 + original texture must be completely gone |
| 垂坠像纸板 | 未指定垂坠刚度 | 追加 drape stiffness 句,给出克重参考 |
| 罗纹/明线消失 | 被新材质吞掉 | 追加保留结构细节句 |
| 面料与品类物理上不成立 | 硬挺布做垂坠款 | 换匹配的面料,或改版型 |
Tips
Visit https://dlazy.com for more information.