用 n8n 自动生成 3D 食物表情图标

表单输入食物名称 → GPT 生成风格 JSON → AI 按提示词目标（400×400、透明背景）渲染图标 → 自动保存到 Google Drive

给谁

需要在 n8n 中批量或按需生成食物主题 3D 表情图的设计师、开发者和内容创作者

你会得到

提交食物名称后，自动生成一张风格统一的 3D 食物表情图标（提示词目标为 400×400 像素、透明背景，实际尺寸与透明度未经本站实测），并保存至 Google Drive

你需要

n8n · google-drive

步骤

1. 配置触发表单

   在 n8n 工作流中添加或确认「Form Trigger」节点（Trigger: Food Emoji Form Submission）。配置表单标题为「Submit a food item」，添加一个必填字段，字段标签为「What food emoji would you like to generate?」，占位文本可填「a green apple」。表单描述建议写：「Enter a food name (e.g. avocado, donut) to generate a 400×400-pixel 3D emoji 🥑」。保存后获取表单 URL 或嵌入方式，用于后续提交。

2. 生成风格 JSON 并渲染图标

   此步骤包含两个顺序执行的子节点： 1) **Prepare Style‑JSON Prompt（Set 节点）**：添加 Edit Fields (Set) 节点，创建字段 `json_generator`，类型为 string，值填入以下表达式（保留原文变量与换行）： ``` =Given the food item: "{{ $json['What food emoji would you like to generate?'] }}", generate a JSON object describing how it should be styled as a 3D-rendered emoji-style icon suitable for use in a digital food icon set. The style should be modern, playful, and semi-realistic, with a transparent background and a 400x400 pixel size. The JSON should include these sections: - form (shape, outline, detail) - lighting (gloss, shadow, detail) - texture (surface, detail) - background (type, detail) - color_handling (strategy, look, detail) - color_palette (detail) Adapt each parameter thoughtfully based on the physical properties and personality of the given food item. ``` 2) **LLM: Generate Style‑JSON（OpenAI 节点）**：添加 OpenAI 节点，模型选择 `gpt-4.1-mini`（源模板实际配置），消息内容填入 `={{ $json.json_generator }}`，开启 `jsonOutput: true`。确保已绑定 OpenAI 凭证。 运行后，该节点输出一段结构化 JSON，描述该食物的表情风格参数。

   运行提示词 · 来源原文。Prepare Style‑JSON Prompt 节点（Edit Fields / Set）的 json_generator 字段值

   复制提示词

   =Given the food item: "{{ $json['What food emoji would you like to generate?'] }}", generate a JSON object describing how it should be styled as a 3D-rendered emoji-style icon suitable for use in a digital food icon set. The style should be modern, playful, and semi-realistic, with a transparent background and a 400x400 pixel size.
   
   The JSON should include these sections:
   
   - form (shape, outline, detail)
   
   - lighting (gloss, shadow, detail)
   
   - texture (surface, detail)
   
   - background (type, detail)
   
   - color_handling (strategy, look, detail)
   
   - color_palette (detail)
   
   Adapt each parameter thoughtfully based on the physical properties and personality of the given food item.

3. 图像生成

   添加 OpenAI 节点，资源类型选择 `image`，模型使用 `gpt-image-1`（来源 workflow.json 所示图像生成模型）。提示词（prompt）填入以下表达式（保留原文变量）： ``` =Generate a 3D-rendered emoji-style digital icon of a {{ $('Trigger: Food Emoji Form Submission').item.json['What food emoji would you like to generate?'] }}, designed with the following visual specifications: {{ $json.message.content.toJsonString() }} Render the icon centered in a 400x400 pixel square, isolated on a transparent background, with no props or text. The result should look like a high-quality digital food emoji: slightly exaggerated, clean, friendly, and polished — consistent with a modern mobile icon set. ``` 确保该节点已绑定 OpenAI 凭证。运行后，节点返回生成的图像数据。

   运行提示词 · 来源原文。Image‑Gen: Render Food Emoji Icon 节点的 prompt 字段

   复制提示词

   =Generate a 3D-rendered emoji-style digital icon of a {{ $('Trigger: Food Emoji Form Submission').item.json['What food emoji would you like to generate?'] }}, designed with the following visual specifications:
   {{ $json.message.content.toJsonString() }}
   
   Render the icon centered in a 400x400 pixel square, isolated on a transparent background, with no props or text. The result should look like a high-quality digital food emoji: slightly exaggerated, clean, friendly, and polished — consistent with a modern mobile icon set.

4. 保存到 Google Drive

   添加 Google Drive 节点，操作选择上传文件。配置如下： - 文件名（name）：`={{ $('Trigger: Food Emoji Form Submission').item.json['What food emoji would you like to generate?'] }}` - 驱动器（driveId）：`My Drive` - 文件夹（folderId）：`root`（或选择已有文件夹） - 输入数据字段（inputDataFieldName）：`data` 确保已绑定 Google Drive OAuth2 凭证。执行后，生成的食物表情图标将以上述文件名保存到指定 Google Drive 位置。

你正在搭建一个 n8n 工作流，用于根据用户输入的食物名称自动生成 3D 表情图标并保存到 Google Drive。请先确认以下前提：1）n8n 实例可访问；2）OpenAI API 凭证（openAiApi）与 Google Drive OAuth2 凭证（googleDriveOAuth2Api）已配置；3）OpenAI 账户已充值并完成组织验证。然后按步骤配置表单触发器、风格 JSON 生成节点、图像生成节点和 Google Drive 保存节点。如需调整提示词风格，可在 Set 节点与图像生成节点中修改对应文本。