近期，Google 推出的 Nano Banana 在 AI 绘图圈内迅速走红，几乎颠覆了传统的图像编辑工作流程。然而，许多用户仍不清楚：究竟该如何撰写提示词，才能充分释放其“多轮细化+角色一致性”这一核心优势？以下这份精心整理的 Prompt 思路清单（以英文为主，搭配翻译工具即可上手），将助你快速掌握 Nano Banana 提示词技巧，避开常见误区。

首先给出核心结论（综合官方文档与媒体/社区实测反馈）：

强项：多轮迭代生成、主体与角色一致性保持、两图智能融合、文字内容可控渲染。
边界：在精细到像素级的裁剪与定比操作上偶有不够顺手的情况，建议在生成阶段就将构图比例与留白区域描述清楚。
写实合成的关键：光源方向、色温统一、焦距匹配三者的一致性比什么都重要。

一、分镜设计与角色一致性保持

适合上传人物或虚拟形象后，直接生成多场景分镜画面。以下几组 Prompt 可作为入门起点：

1. Transform the uploaded portrait into a collectible character figurine. Place a branded box behind (with the character image), a side monitor showing a Blender modeling viewport, and a round plastic base. PVC finish, indoor studio, realistic lighting, cinematic tone, preserve facial identity.
2. Keep the same character. Scene 1: subway platform, cool-blue ambience, back rim light; chest-level camera, medium shot.
3. Same identity, coffee shop close-up, shallow depth of field (bokeh), warm golden-hour light; hands holding a paper cup with subtle steam; maintain hairstyle.
4. Same character, office at night, glass reflections, city-lights bokeh, classic three-point lighting, medium-wide.
5. Same character, warehouse with volumetric light rays through windows; dust motes, slightly desaturated cinematic look.
6. Storyboard (6 frames): hero intro → establishing shot → hands close-up → over-the-shoulder UI → product hero → end card. Preserve identity and wardrobe across frames.
7. Change pose to a forward-walking action; slight motion blur on legs; facial details intact.
8. Rainy street, wet asphalt reflections, neon signage; keep eye color and freckles.
9. Neutral studio packshot background; soft top light, fill card from camera left; neutral expression.
10. Shot list for unboxing (8 frames): box on table → hands open → figure removed → detail macros → turntable spin → final hero; maintain product scale and branding.

二、电商合成与商品场景搭建

电商场景的核心在于光源、反射与阴影的一致性控制。试试以下 Prompt：

1. Merge image1 (product) with image2 (modern kitchen). Place on marble countertop, realistic reflections + shadows; ~5000K color temp, gentle vignette.
2. Cosmetics bottle on acrylic pedestal, seamless paper backdrop; right-side softbox; subtle gradient background; controlled speculars.
3. Sneakers on concrete block, low-angle hero shot, studio rim light, faint atmospheric haze.
4. Smartphone floating exploded view: separate screen, mid-frame, camera module; dark studio, managed glossy reflections.
5. Watch macro, 90° top-down, soft diffused light; brushed metal visible; dial text anti-aliased.
6. A/B variants: keep layout identical; swap only background material (wood / stainless / terrazzo); product color constant.
7. Lifestyle placement: living-room sofa; daylight from window (camera left); product on side-table; white balance matched.
8. Promo trio within one session: front / 45° / top; consistent brand palette and shadows.

三、人像妆造与服饰替换，保持身份特征

保持面部特征不变，仅调整发型、服装或配饰：

1. Preserve face identity; change hairstyle to retro bob; thin eyeliner; soft retouch while keeping skin pores; realistic flyaway strands.
2. Outfit swap to streetwear (oversized hoodie + cargo pants); neutral studio background; soft Rembrandt pattern.
3. Add sunglasses with subtle reflections; eyes faintly visible through tint.
4. Formal portrait, key at 45°, fill −1EV; seamless #EAEAEA background; color-accurate skin tone.
5. Outdoor candid, overcast sky as a giant softbox; slight film grain; keep freckles/moles.
6. ID headshot: straight-on, neutral expression; flat even light; neutral background; exact facial geometry maintained.

（注：该案例来源于果壳网，仅作演示用途——因作者本人为男性，无法亲自cos暴走萝莉角色?）

四、像专业摄影师一样描述光影

运用摄影术语来描述光影与氛围，往往能获得更精准的生成效果：

1. Film noir: hard key from high angle, deep shadows, a practical lamp in the back, light smoke for volume.
2. Golden-hour backlight: rim light on hair, subtle flare streaks, warm highlights ~5600K.
3. Top-down softbox + negative fill on both sides shaping the face; subtle catchlights.
4. High-key beauty: near-white backdrop, low contrast, controlled speculars.
5. Rain reflections: wet-down street, neon glow, long-exposure light trails.
6. Product hero: flagged highlights, gradient card for polished metal, tight base reflection.

五、材质细节与质感表现

描述材质时，需抓住关键的视觉特征：

1. PVC plastic: slightly translucent edges, smooth specular roll-off, no micro-scratches.
2. Anodized aluminum: fine linear brushing, soft anisotropic highlights.
3. Matte ceramic: soft diffuse, micro-pitting visible only in macro.
4. Brushed stainless with subtle fingerprints near buttons, realistic.
5. Frosted glass bottle: internal light scatter; bright meniscus line on the liquid.

六、文字排版与海报设计

官方强调对含文本图像进行过专项优化，适合海报、Logo、封面等场景：

1. Poster: bold headline “AI VIDEO STUDIO”, small-caps subheadline; clean sans serif; centered layout; hero product at bottom-right; strong grid with optical margin alignment.
2. Minimal event flyer: big date “09·10”, venue in a small line below; keep text sharp and aligned.
3. App mock poster: phone frame with screen UI; headline 5-6 words; badge “NEW”.
4. Brand logo lockup on dark background; subtle glow; high legibility; no distortion.
5. YouTube thumbnail: big face close-up + 3-5 word punchy title; high contrast; rule of thirds.

七、图像合成与场景替换

两图融合配合多轮细化是 Nano Banana 的核心亮点；真实感取决于光源、焦距与色温的一致性：

1. Replace background with a snowy mountain; match key from camera right; faint footprints in snow.
2. Museum gallery: polished floor reflections; soft track lighting from ceiling.
3. Night-city rooftop: wind-blown hair; cool key light; warm practicals behind.
4. Product + bathroom marble vanity: soft window light; consistent mirror reflections.
5. Library: warm tungsten practicals; lens fall-off consistent with a 50mm look.
6. Declutter a desk: keep laptop and mug; fill missing areas with plausible textures.

八、镜头语言与构图技巧

利用镜头参数精确控制构图效果：

1. 35mm equivalent, eye-level, medium shot, rule of thirds.
2. 85mm portrait, shallow DOF, strong background separation.
3. Top-down flat-lay, grid-aligned objects, tidy spacing.
4. Low-angle hero, leading lines converging to subject.
5. Tilt-shift miniature, thin focus plane across subject.

九、视觉特效与氛围营造

氛围细节能够大幅提升画面的沉浸感：

1. Light fog + god rays from a window; particles only visible against backlight.
2. Fine film grain, minimal chromatic aberration, letterboxed.
3. Rain streaks + surface ripples on puddles; reflections preserved.
4. Fireflies / bokeh spheres floating; depth-based size variation.
5. Confetti burst, shallow DOF; motion blur only on confetti.

十、多轮对话脚本模板（官方推荐）

以下是三个经过实测验证的多轮脚本模板，可直接套用：

脚本 A｜人物置景（3 步）

1. Round 1: Upload the portrait; place the same person on a sunlit café terrace; warm golden-hour, shallow DOF, cinematic.
2. Round 2: Keep identity; add a laptop with a code editor on screen + a steaming cup; cool the white balance slightly.
3. Round 3: Tighten to a medium shot; brighten catchlights; add gentle film grain.

脚本 B｜商品三视图（3 步）

1. Round 1: Front hero on a neutral backdrop; soft top light; clean shadows.
2. Round 2: Add a 45° view; match exposure and shadow direction.
3. Round 3: Add a top view; assemble a three-panel layout with consistent margins.

脚本 C｜角色手办化（3 步）

1. Round 1: Turn the subject into a PVC figure on a round base; indoor studio; filmic tone.
2. Round 2: Add a branded box behind + a monitor showing a Blender viewport.
3. Round 3: Refine hair/finger edges; ensure smooth specular highlights.

十一、n8n 集成字段模板（可直接复用）

如果你使用 n8n 搭建自动化工作流，以下 JSON 模板可以直接粘贴使用：

{
  "prompt": "Turn the uploaded portrait into a collectible character figurine on a round plastic base; branded box behind; monitor shows a Blender viewport; PVC look; indoor studio; realistic lighting; cinematic tone; keep identity.",
  "style_notes": "cinematic, shallow DOF, subtle film grain",
  "consistency_notes": "fix face geometry, eye color, hairstyle",
  "scene_alt": ["sunlit café terrace", "office at night", "rainy neon street"],
  "product_merge": {
    "bg": "modern kitchen marble countertop",
    "shadows": "match key from camera right",
    "reflections": "controlled, realistic"
  }
}

实操要点（精炼复盘）

• 先场景后细节：用完整句子勾勒画面整体，再逐步补充光源、景深、材质等信息；少堆砌词汇，多描述元素之间的“关系”。
• 小步快迭代：每一轮仅调整 1–2 个变量（例如只改变光源方向，或只收窄景深范围）。
• 一致性三件套：提供清晰的参考图、固定面部/发型/肤色描述、避免一次性进行大幅修改。
• 规避裁剪痛点：在生成阶段就把构图比例、留白区域、版面布局说清楚，减少后期硬性裁剪的需求。