53 lines
3.4 KiB
Markdown
53 lines
3.4 KiB
Markdown
---
|
||
title: "Unity Shader Graph Artist"
|
||
type: source
|
||
tags: [agent, unity, shader, game-development, urp, hdrp, hlsl, visual-effects]
|
||
date: 2026-05-01
|
||
---
|
||
|
||
## Source File
|
||
- [[raw/Agent/agency-agents/game-development/unity/unity-shader-graph-artist.md]]
|
||
|
||
## Summary（用中文描述）
|
||
- 核心主题：Unity Shader Graph Artist 智能体的角色定义、技术规范和工作流程，专注文体化与写实shader创作
|
||
- 问题域：Unity渲染管线（URP/HDRP）下的shader创作、HLSL性能优化、shader架构规范
|
||
- 方法/机制：通过Shader Graph实现美术可编辑shader，通过Sub-Graph实现逻辑复用，通过ScriptableRendererFeature实现自定义渲染通道
|
||
- 结论/价值：建立了一套完整的Unity shader开发规范，覆盖从设计到交付的全流程
|
||
|
||
## Key Claims（用中文描述）
|
||
- Shader Graph 规范：所有重复逻辑必须封装为 Sub-Graph，禁止节点集群重复，否则视为维护失败
|
||
- 渲染管线规则：URP/HDRP 项目禁止使用 built-in 管线shader；URP 自定义通道必须用 `ScriptableRendererFeature + ScriptableRenderPass`，不能用 `OnRenderImage`
|
||
- 性能标准：移动端每片段最多32次纹理采样、不透明片段最多60条ALU指令；避免在移动端使用 `ddx`/`ddy` 导数
|
||
- HLSL 规范：使用 `.hlsl` 扩展名声明include文件，使用 `.shader` 扩展名声明 ShaderLab wrapper；必须用 `TEXTURE2D`/`SAMPLER` 宏替代 `sampler2D`
|
||
- Dissolve shader 关键逻辑：噪声纹理驱动消融 → Alpha Clip 实现切割边缘 → emissive 边缘高光
|
||
|
||
## Key Quotes
|
||
> "Every Shader Graph must use Sub-Graphs for repeated logic — duplicated node clusters are a maintenance and consistency failure." — Shader Graph Architecture Rule
|
||
> "URP custom passes use `ScriptableRendererFeature` + `ScriptableRenderPass` — never `OnRenderImage` (built-in only)" — URP/HDRP Pipeline Rules
|
||
> "Use `TEXTURE2D` / `SAMPLER` macros from `Core.hlsl` — direct `sampler2D` is not SRP-compatible" — HLSL Authorship Rules
|
||
|
||
## Key Concepts
|
||
- [[Shader Graph]]：Unity可视化shader编辑工具，支持美术驱动的节点化shader创作
|
||
- [[URP (Universal Render Pipeline)]]：Unity通用渲染管线，Shader Graph主要支持的管线
|
||
- [[HDRP (High Definition Render Pipeline)]]：Unity高清渲染管线，与URP的API不兼容
|
||
- [[HLSL]]：High Level Shading Language，用于编写高性能shader逻辑
|
||
- [[ScriptableRendererFeature]]：URP自定义渲染通道的核心扩展点
|
||
- [[Sub-Graph (Shader Graph)]]：Shader Graph中的可复用子图模块
|
||
- [[Alpha Clipping]]：透明度裁剪，优于Alpha Blend，无深度排序问题
|
||
- [[Dissolve Shader]]：消融shader，通过噪声纹理驱动切割效果
|
||
- [[Fresnel]]：边缘高光效果，基于视角方向和法线夹角计算
|
||
- [[RenderDoc]]：GPU调试工具，用于shader输入输出和寄存器值检查
|
||
|
||
## Key Entities
|
||
- [[Unity]]：游戏引擎厂商，Shader Graph、URP、HDRP的提供方
|
||
- [[UnityShaderGraphArtist]]：该智能体的角色名，专注于shader艺术与性能的平衡
|
||
|
||
## Connections
|
||
- [[Unity Architect]] ← 专业分工 ← [[Unity Shader Graph Artist]]
|
||
- [[Unity Multiplayer Engineer]] ← 共享工作流 ← [[Unity Shader Graph Artist]]
|
||
- [[Technical Artist]] ← 职责交叉 ← [[Unity Shader Graph Artist]]
|
||
- [[Unreal Technical Artist]] ← 功能对标 ← [[Unity Shader Graph Artist]]
|
||
|
||
## Contradictions
|
||
- 无已知冲突
|