vault backup: 2025-03-27 18:35:48

.obsidian/plugins/various-complements/histories.json

@@ -1 +1 @@
-{"Deprecated":{"Deprecated":{"internalLink":{"count":1,"lastUpdated":1740405714148}}},"PS.需要Shader添加FSceneTextureShaderParameters":{"PS.需要Shader添加FSceneTextureShaderParameters":{"currentFile":{"count":1,"lastUpdated":1740983366427}}},"和blender共同制作，山脉为":{"和blender共同制作，山脉为":{"currentFile":{"count":1,"lastUpdated":1741610747166}}},"BlueprintCosmetic":{"BlueprintCosmetic":{"internalLink":{"count":1,"lastUpdated":1741951657866}}},"ReflectionsColor":{"ReflectionsColor":{"currentFile":{"count":1,"lastUpdated":1742739458164}}},"主要执行了：":{"主要执行了：":{"currentFile":{"count":1,"lastUpdated":1742830096172}}},"尝试平滑Lumen中的SH。":{"尝试平滑Lumen中的SH。":{"currentFile":{"count":1,"lastUpdated":1742910977705}}}}
+{"PS.需要Shader添加FSceneTextureShaderParameters":{"PS.需要Shader添加FSceneTextureShaderParameters":{"currentFile":{"count":1,"lastUpdated":1740983366427}}},"和blender共同制作，山脉为":{"和blender共同制作，山脉为":{"currentFile":{"count":1,"lastUpdated":1741610747166}}},"BlueprintCosmetic":{"BlueprintCosmetic":{"internalLink":{"count":1,"lastUpdated":1741951657866}}},"ReflectionsColor":{"ReflectionsColor":{"currentFile":{"count":1,"lastUpdated":1742739458164}}},"主要执行了：":{"主要执行了：":{"currentFile":{"count":1,"lastUpdated":1742830096172}}},"尝试平滑Lumen中的SH。":{"尝试平滑Lumen中的SH。":{"currentFile":{"count":1,"lastUpdated":1742910977705}}},"SupportDynamicSliderMinValue":{"SupportDynamicSliderMinValue":{"internalLink":{"count":1,"lastUpdated":1743066829865}}}}

03-UnrealEngine/Rendering/RenderFeature/Lumen学习笔记（5）——向往大佬文章学习笔记.md

@@ -0,0 +1,11 @@
+---
+title: 未命名
+date: 2025-03-27 16:31:21
+excerpt: 
+tags: 
+rating: ⭐
+---
+# 前言
+
+
+# LumenScreenProbeGather

03-UnrealEngine/卡通渲染相关资料/卡通渲染开发总览.md

@@ -45,7 +45,6 @@ rating: ⭐⭐⭐
 		- 【【UE5卡渲】椿 - K表情练习】 https://www.bilibili.com/video/BV1ay411b7Cm/?share_source=copy_web&vd_source=fe8142e8e12816535feaeabd6f6cdc8e
 		-  卡通渲染晕染效果【【UE5】一些最近做的好玩的卡渲后效】 https://www.bilibili.com/video/BV1gi421v7HA/?share_source=copy_web&vd_source=fe8142e8e12816535feaeabd6f6cdc8e
 		- [【Unity/虚幻5/Blender】3种引擎 绝区零风格 卡通渲染 星见雅 完整流程](https://www.bilibili.com/video/BV1kBBKYRE6Q/?share_source=copy_web&vd_source=fe8142e8e12816535feaeabd6f6cdc8e)
-		- 
 - 动漫制作
 	- 2024年4月新番 Girls Band cry【日本最顶级的3D动画制作过程【GBC官方动捕制作片段】】 https://www.bilibili.com/video/BV1uM4m1U7CL/?share_source=copy_web&vd_source=fe8142e8e12816535feaeabd6f6cdc8e
 
@@ -127,11 +126,14 @@ rating: ⭐⭐⭐
 	3. [ ] Matcap
 	4. [ ] ASoul边缘光
 10. [ ] Reflection控制
+	1. [x] ReflectionAlpha实现。
+	2. [ ] Matcap Reflection实现。
 11. [ ] Toon GI（Lumen)
 	1. [ ] 向下采样
 	2. [ ] 平滑法线采样
 		1. [ ] 使用哪个https://zhuanlan.zhihu.com/p/25839790454
-		2. [ ] 尝试平滑Lumen中的SH。 
+		2. [ ] 尝试抹平Lumen法线。
+		3. [ ] 尝试使用ViewVector来平滑法线。
 			1. 用相机方向的话，随着相机绕角色旋转，角色身上亮度变化会比较明显，所以视频里用的是把平滑度乘在Lumen的1-2阶球谐上
 			2. 伪代码 OutSH = SH0 + (SH1 + SH2) * Smoothness;
 12. [ ] 阴影控制
@@ -146,6 +148,7 @@ rating: ⭐⭐⭐
 14. [ ] ToonTranslucent
 	1. [ ] 通过模仿SingleLayerWater实现折射效果 https://zhuanlan.zhihu.com/p/657928532
 	2. [ ] 眉眼细节 [[幻塔-眉眼细节.png]]
+		1. [ ] 【【Unity/虚幻5/Blender】3种引擎 崩坏: 星穹铁道风格 卡通渲染 从球谐光照到眉毛透过刘海 完整流程】 【精准空降到 1:24:29】 https://www.bilibili.com/video/BV1CN411C7qx/?share_source=copy_web&vd_source=fe8142e8e12816535feaeabd6f6cdc8e&t=5069
 	3. [ ] [【UE5】逐材质stencil、半透明排序、OverlayMaterial](https://zhuanlan.zhihu.com/p/31171114411)
 15. [ ] TSR
 	1. [ ] [UE TAAU详细解析](https://zhuanlan.zhihu.com/p/681910495)

03-UnrealEngine/卡通渲染相关资料/渲染功能/ToonReflection&GI控制/Toon GI & Lumen.md

@@ -0,0 +1,69 @@
+---
+title: 未命名
+date: 2025-03-27 17:37:02
+excerpt: 
+tags: 
+rating: ⭐
+---
+# Toon Lumen
+抹平法线思路：
+
+在`LumenScreenProbeGather.usf`中对法线进行抹平处理。其Pass位于
+- DiffuseIndirectAndAO
+	- LumenScreenProbeGather
+		- Integrate
+			- SimpleDiffuse/SupportImportanceSampleBRDF?/SupportAll?
+
+在如下位置添加代码：
+```c++
+if (IsValid(Material))
+	{
+		const float2 ScreenUV = (Coord.SvPosition + 0.5f) * View.BufferSizeAndInvSize.zw;
+		const float3 WorldPosition = GetWorldPositionFromScreenUV(ScreenUV, Material.SceneDepth);
+		const float3 WorldNormal = Material.WorldNormal;
+		//BlueRose Modify 
+		if (Material.ShadingID == SHADINGMODELID_TOONSTANDARD)
+		{
+			//使用Yu-ki016的方法“抹平法线”
+			float3 V = normalize(LWCHackToFloat(PrimaryView.WorldCameraOrigin) - WorldPosition);
+			const uint ToonDataAssetID = GetToonDataAssetIDFromGBuffer(Material.GBufferData);
+			float DiffuseIndirectLightingFlatten = GetDiffuseIndirectLightingFlatten(ToonDataAssetID);
+			Material.WorldNormal = normalize(lerp(WorldNormal, V, DiffuseIndirectLightingFlatten));
+		}
+		//BlueRose Modify End
+		...
+	}
+}
+```
+
+该方法存在一些问题：**当相机围绕角色旋转时，角色身上的 GI变化会比较明显**。
+
+# Spherical Harmonics
+UE5中采样球谐贴图方法(ReflectionEnvironmentShared.ush)：
+```c++
+/** 
+ * Computes sky diffuse lighting from the SH irradiance map.  
+ * This has the SH basis evaluation and diffuse convolution weights combined for minimal ALU's - see "Stupid Spherical Harmonics (SH) Tricks" 
+ */
+float3 GetSkySHDiffuse(float3 Normal)
+{
+	float4 NormalVector = float4(Normal, 1.0f); 
+
+	float3 Intermediate0, Intermediate1, Intermediate2;
+	Intermediate0.x = dot(SkyIrradianceEnvironmentMap[0], NormalVector);
+	Intermediate0.y = dot(SkyIrradianceEnvironmentMap[1], NormalVector);
+	Intermediate0.z = dot(SkyIrradianceEnvironmentMap[2], NormalVector);
+
+	float4 vB = NormalVector.xyzz * NormalVector.yzzx;
+	Intermediate1.x = dot(SkyIrradianceEnvironmentMap[3], vB);
+	Intermediate1.y = dot(SkyIrradianceEnvironmentMap[4], vB);
+	Intermediate1.z = dot(SkyIrradianceEnvironmentMap[5], vB);
+
+	float vC = NormalVector.x * NormalVector.x - NormalVector.y * NormalVector.y;
+	Intermediate2 = SkyIrradianceEnvironmentMap[6].xyz * vC;
+
+	// max to not get negative colors
+	return max(0, Intermediate0 + Intermediate1 + Intermediate2);
+}
+```
+