1. **Analyze the Request:** * **Current State:** Previous draft had 1291 Chinese characters, which is over the 1000 limit. * **Goal:** Rewrite the introduction to be between 500 and 1000 Chinese characters. * **Specific Instructions:** * Add missing elements: learning sequence, prerequisite, post-learning output, material usage. * If too long, delete repetition and empty phrases. * Do not exceed 1000 characters. * Do not stack titles unnecessarily. * Do not list filenames. * Output only HTML fragments. * Keep the tone engineering-focused, structured, reusable, less marketing-speak. * Must cover: What problem this course solves, suitable background, recommended sections to watch first, what you can do independently after learning, how to use the materials for practice. * Must be specific to the topic (Photoshop compositing/poster design), not a generic template. * Ignore irrelevant prefixes (like "Testing/Operations" classification, focus on the IT/Dev aspect of compositing workflows). * No AI self-identification, no other site names. * Use `
`, `
`, `
`, `
`. 2. **Deconstruct the Topic & Content:** * **Topic:** Photoshop compositing (创意合成海报/PS合成). * **Problem Solved:** Transforming ad-hoc visual blending into a structured, reusable rendering pipeline (光影逻辑, 场景搭建, 创意诞生). * **Background:** Developers/Designers with basic image processing knowledge but lacking systematic compositing workflows. * **Recommended Sections:** Start with sketching/ideation, then scene building/layer structure, then lighting/light logic, finally atmosphere rendering. * **Post-learning Output:** Independently create high-quality composited posters with clear logical chains, moving from "feeling" to "engineering". * **Material Usage:** Follow the 5 comprehensive cases step-by-step to validate the workflow modules. 3. **Drafting - Section by Section (aiming for concise, engineering-focused language):** * *Heading 1: 解决什么问题* 这门课针对图像合成中工作流零散、光影逻辑依赖灵感而非工程拆解的痛点，将 Photoshop 合成从肉眼拼图转化为可复用的渲染管线。课程通过综合案例，系统拆解创意诞生、场景搭建、复杂光影逻辑与氛围渲染的完整链路，解决合成时“搭出来不好看、改起来无从下手”的工程化问题。 * *Heading 2: 适合什么基础与建议先看哪几块* 适合具备基础图像处理认知、了解图层概念但缺乏系统合成工作流拆解的开发者或设计师。建议按“草图构思”与“画面搭建”切入，先建立场景图层的复用逻辑，再攻克“光影分析”，最后通过“氛围渲染”完成闭环。 * *Heading 3: 学完能独立做什么与资料怎么配合练习* 学完能独立完成具有明确逻辑链的创意合成海报，掌握场景搭建与光影拆解的工程方法，不再依赖感觉，而是依靠可复用的模块产出惊艳作品。配合资料练习时，建议对照 5 个综合案例，从搭建到渲染逐步拆解，在实操中验证工作流模块的落地性。 4. **Character Count & Refinement (Iterative check):** * *Heading 1:* 解决什么问题 (6) 这门课针对图像合成中工作流零散、光影逻辑依赖灵感而非工程拆解的痛点，将 Photoshop 合成从肉眼拼图转化为可复用的渲染管线。课程通过综合案例，系统拆解创意诞生、场景搭建、复杂光影逻辑与氛围渲染的完整链路，解决合成时“搭出来不好看、改起来无从下手”的工程化问题。 (128 chars) * *Heading 2:* 适合什么基础与建议先看哪几块 (13) 适合具备基础图像处理认知、了解图层概念但缺乏系统合成工作流拆解的开发者或设计师。建议按“草图构思”与“画面搭建”切入，先建立场景图层的复用逻辑，再攻克“光影分析”，最后通过“氛围渲染”完成闭环。 (102 chars) * *Heading 3:* 学完能独立做什么与资料怎么配合练习 (17) 学完能独立完成具有明确逻辑链的创意合成海报，掌握场景搭建与光影拆解的工程方法，不再依赖感觉，而是依靠可复用的模块产出惊艳作品。配合资料练习时，建议对照综合案例，从搭建到渲染逐步拆解，在实操中验证工作流模块的落地性。 (110 chars) * *Total count:* 6 + 128 + 13 + 102 + 17 + 110 = 376 chars. Wait, this is too short! I need 500-1000. * Let's expand the content while keeping it engineering-focused and avoiding fluff. 5. **Expansion & Engineering Angle:** * *Heading 1: 解决什么问题* 这门课针对图像合成中工作流零
