retro-halftone-hero

name	retro-halftone-hero
description	Create premium retro halftone hero images, landscape campaign visuals, travel-poster style website headers, and high-end promotional posters from either a fresh scene prompt or an existing photo/image reference. Use whenever the user asks for retro halftone, vintage print texture, premium travel poster, CMYK dots, ink bleed, analog print, paper texture over a normal photo, or 高级复古半调、网点纹理、风景宣传图、海报质感、旅行海报、照片加半调质感. Strong visual core is a cinematic base image plus CMYK / riso halftone dots driven by tonal values, subtle ink bleed, paper grain, and restrained color. Do NOT use for comic panels, dense infographics, UI mockups, product cutouts, screen-print duotone editorial posters with heavy typography, or cheap global filter effects.
icon	scan-line
preview_image	/skill-previews/retro-halftone-hero.jpg
display_name	{"zh-CN":"复古半调 Hero","en":"Retro Halftone Hero"}
display_description	{"zh-CN":"给风景照 / 宣传图叠加高级复古半调、纸纹和油墨质感。","en":"Premium retro halftone, paper grain, and ink texture for landscape hero visuals."}
starter_examples	{"zh-CN":["阿尔卑斯湖畔旅行海报，复古半调，清晨冷色调","海岸公路品牌 Hero，高级 CMYK 网点，纸纹质感","荒漠户外宣传图，低饱和橙蓝，局部油墨错位"],"en":["alpine lakeside travel poster, retro halftone, cool morning palette","coastal road brand hero, refined CMYK dots, paper grain","desert outdoor campaign image, muted orange blue, ink misregistration"]}

Retro Halftone Hero

为风景照、网站 hero、旅行宣传图、品牌活动海报生成 rich, premium retro halftone print feel。视觉目标是“正常照片或干净插画上覆盖一层有控制的印刷质感”，不是把整张图粗暴套滤镜。

核心判断：

• 先要有一个构图漂亮、光线高级的 base image。
• halftone 作用在整张图的明暗层次上，dot density 跟随 tonal values，不是套一层均匀滤镜。
• 质感来自分层：轻微纸纹、局部 CMYK / riso 网点、少量 ink bleed、柔和色彩错位，而不是噪点堆满。

何时触发

适用：

• 风景 / 旅行 / 户外品牌 / 酒店度假 / premium lifestyle hero 图。
• 用户说“照片加一层 halftone texture / retro print / vintage travel poster feel”。
• 已有图片需要二次风格化，但主体、构图、摄影感要保留。
• 需要宽幅宣传图、海报背景、网站首屏等高质感风景 / 品牌视觉。

不适用：

• 影评 / 书评 / 演唱会这类重排版 screen-print 海报：优先用 editorial-poster。
• 信息图、知识卡片、PPT、UI 截图、产品白底图、漫画分镜。
• 想要完全写实照片且不要任何印刷质感。
• 需要大量可读文字的正式海报成品。

工作流选择

根据用户输入选择一种路径：

1. 已有图二次质感化：用户提供 reference image / image_id / 历史图时，先用 ReadImage 理解画面；再用 GenImage 以该图为 reference_image_ids，执行 halftone texture pass。
2. 从零生成两步法（推荐）：用户只给主题时，先生成 clean premium base image；等待生成完成后，再把第一张输出作为 reference，执行 halftone texture pass。两步法更像真实设计流程，能分别控制构图和质感。
3. 快速一张法：用户明确只要一次出图或快速草稿时，把 base scene 与 halftone rules 写进同一个 prompt。

不要在 GenImage 前额外做确认；GenImage 任务卡本身就是审批入口。

一次问齐

如果用户没有给够信息，用一次 AskUserQuestion 收集缺失维度。主题、具体地点、品牌语气、标题文案放在备注里，不要拆成多轮。

{
  "questions": [
    {
      "question": "这张图主要用于哪里？",
      "header": "用途",
      "multi_select": false,
      "options": [
        { "label": "网站 Hero", "description": "宽幅首屏背景，复古印刷感的品牌首图" },
        { "label": "旅行海报", "description": "复古目的地宣传图，构图更像 premium poster" },
        { "label": "活动视觉", "description": "品牌 campaign / launch / 户外活动 KV" },
        { "label": "照片改造", "description": "给已有照片加半调印刷质感，保留主体构图" }
      ]
    },
    {
      "question": "半调质感强度？",
      "header": "质感",
      "multi_select": false,
      "options": [
        { "label": "Subtle premium", "description": "克制细网点 + 轻纸纹，适合高级品牌（推荐）" },
        { "label": "Visible print", "description": "明显 CMYK / riso 网点，但不破坏画面" },
        { "label": "Aged poster", "description": "更强纸张旧化、油墨扩散、轻微错版" }
      ]
    },
    {
      "question": "画面构图偏好？",
      "header": "构图",
      "multi_select": false,
      "options": [
        { "label": "Panoramic vista", "description": "宽幅远景，山谷 / 海岸 / 沙漠 / 森林层次（推荐）" },
        { "label": "Poster frame", "description": "更像旅行海报，主体居中，边缘有纸张感" },
        { "label": "Hero layout", "description": "均衡宽幅构图，适合做网站首图或 campaign 背景" },
        { "label": "Photo preserve", "description": "尽量保留参考图构图，只改质感和色彩" }
      ]
    },
    {
      "question": "色彩气质？",
      "header": "配色",
      "multi_select": false,
      "options": [
        { "label": "Warm cream", "description": "奶油天空、金色高光、自然绿蓝，最 premium" },
        { "label": "Alpine cool", "description": "冷蓝远山、鼠尾草绿、少量暖金" },
        { "label": "Sunset amber", "description": "琥珀夕照、深绿阴影、复古旅行感" },
        { "label": "Muted editorial", "description": "低饱和杂志感，适合品牌宣传" }
      ]
    }
  ]
}

Prompt 结构

优先写英文 prompt。Gemini / Nano Banana Pro 对结构化英文的风格控制更稳。

A. Clean base image prompt

从零生成时，第一步只生成干净 base，不要先加重网点。

Create a premium cinematic landscape hero image for {{usage}}: {{scene_topic}}.

Composition: {{composition_choice}}. Wide balanced composition, strong foreground / midground / background separation, clear leading line toward the main landscape feature.

Scene details: {{specific_location_or_subject}}, natural scale, calm and refined mood, no people unless explicitly requested, no buildings unless explicitly requested.

Light and color: {{palette_choice}}. Soft atmospheric perspective, golden light touching important forms, muted natural greens and cool blues, warm cream tones near the horizon. Premium modern travel campaign look, visually minimal but detailed where it matters.

Rendering: polished photo-illustration / slightly painterly digital illustration look, sharp foreground details, no text, no logo, no watermark.

Negative: no cheap filter look, no overprocessed HDR, no fog overload, no heavy darkness, no random typography, no sun disk unless requested, no people, no buildings.

推荐第一步参数：

{
  "model": "nano-banana-pro",
  "resolution": "2K",
  "ratio": "16:9",
  "sample_count": 1,
  "reference_image_ids": []
}

B. Halftone texture pass prompt

第二步把 base image 或用户原图作为 reference_image_ids。这一步的 prompt 重点是“保留构图 + 添加选择性印刷质感”。

Transform the reference image into a premium retro halftone print hero visual while preserving the original composition, subject placement, camera angle, and main light direction.

Apply a refined vintage print treatment:
- Add CMYK / riso-style halftone dots across the whole image with dot density driven by tonal values: denser and larger dots in midtones and shadows, finer and sparser dots in highlights. Dots should feel printed, not like a flat uniform filter.
- Let the halftone structure shape every area the same way — terrain, foliage, water, clouds, and atmosphere — so the result reads as one cohesive print, not a selective overlay.
- Add gentle ink bleed at high-contrast edges, tiny paper fibers, faint speckles, and mild color misregistration limited to 1-3 px.
- Preserve premium color harmony: {{palette_choice}}, muted natural greens, cool blues, warm cream highlights, golden light on important forms.

Art direction: nostalgic travel-poster aesthetic, rich premium feel, elegant editorial campaign background, calm refined mood.

Constraints:
- Do not change the subject or composition.
- Keep dot density tied to the underlying tonal values; avoid one flat uniform dot layer across everything.
- Do not add text, logos, stamps, watermarks, borders, labels, or fake poster titles unless explicitly requested.
- Avoid grunge overload, cheap photocopy filter, heavy darkness, harsh contrast, plastic digital noise, and muddy colors.

推荐第二步参数：

{
  "model": "nano-banana-pro",
  "resolution": "4K",
  "ratio": "16:9",
  "sample_count": 1,
  "reference_image_ids": ["{{base_or_user_image_id}}"]
}

4K 更利于解析细小网点；如果用户只是快速预览，可用 2K。

一张法 prompt 示例

当用户要快速生成，不走两步法时，用下面这种完整 prompt：

Wide cinematic mountain landscape illustration in a premium retro halftone print style, peaceful alpine valley with tall pine forests, rocky foreground, winding dirt path, majestic snow-capped mountain range in the center, balanced panoramic composition.

Vintage paper texture and refined CMYK / riso print feel across the whole image, dot size and density driven by tonal values: denser larger dots in midtones and shadows, finer sparser dots in highlights and atmospheric areas. Gentle ink bleed at high-contrast edges, faint paper fibers, mild 1-3 px color misregistration. Soft atmospheric perspective, muted natural greens and cool blues, warm cream horizon tones, golden light touching mountain peaks, slightly painterly digital illustration look, nostalgic travel-poster aesthetic, sharp foreground details, calm elegant mood, panoramic wide-angle scene, highly detailed but visually minimal, rich premium feel.

Negative: no sun, no people, no buildings, no fog overload, no heavy darkness, no flat uniform filter layer, no text, no logo, no watermark.

参考图处理

当用户提供参考图：

1. 用 ReadImage 看清参考图的构图、光源、主体、需要保留的元素。
2. 在 prompt 里写明保留项：MUST preserve composition, subject scale, horizon placement, light direction, and main color relationships from the reference.
3. 如果用户给的是普通照片，只做第二步 texture pass。
4. 如果用户给的是风格参考而不是主体图，把它描述成 texture inspiration，不要把它放进主体保留项。

常见修改映射

用户反馈	修改方式
“太像滤镜了”	强调 dot size and density driven by tonal values，让网点跟随形体和明暗，不是一层均匀滤镜
“不够复古”	增加 paper fibers、slight ink bleed、mild color misregistration、warm cream base
“不够高级”	降低饱和度和对比度，减少破损，使用 muted editorial palette，保持构图克制
“网点不明显”	从 Subtle premium 升到 Visible print，要求 dot structure visible across midtones & shadows
“想更像旅行海报”	居中远山 / 地标、清晰前中后景、warm cream horizon、nostalgic poster composition

质量检查

生成或改图后检查：

• 构图是否仍然像 premium hero / campaign visual，而不是随机纹理实验。
• 网点大小 / 密度是否跟随物体明暗和材质（亮部稀疏、中间调和阴影更密），而不是整张图等距铺一层。
• 是否保留了参考图主体、光线方向和主要构图。
• 有没有多余文字、logo、水印、边框、脏污块或过重 grunge。