多光源阴影¶
单光源 ![[Pasted image 20250205104839.png]] 多光源 ![[Pasted image 20250205104819.png]] 阴影图集 ![[Pasted image 20250205105605.png]]
初版多光源阴影¶
![[Pasted image 20250205145426.png]]
级联阴影¶
为每个光源都创建四个级联阴影贴图，最多可以达到4x4的贴图划分。每个级联阴影也需要对应的阴影矩阵
![[Pasted image 20250205190240.png]]
其本质是剔除球体的创建 ![[Pasted image 20250205190652.png]]
阴影淡化¶
![[Pasted image 20250206133825.png]]
级联淡化¶
![[Pasted image 20250206192341.png]]
Depth Bias&slope-scale bias¶
光线推离光源¶
50000能消除一个伪影 500000才能基本消除全部的bias，导致PeterPanning ![[Pasted image 20250206193352.png]]
斜率刻度偏差¶
改变斜率，这里后面用于设置灯光的微调，原理差不多，也有perter-panning
Normal Bias¶
根据深度计算纹素大小，并将其提前沿法线偏移 ![[Pasted image 20250206202107.png]]
Shadow Pancaking¶
![[Pasted image 20250206205718.png]] ![[Pasted image 20250206205624.png]]
PCF¶
![[Pasted image 20250206214155.png]]
Cascade Blend级联混合¶
![[Pasted image 20250206214738.png]]
插值过渡与抖动过渡¶
![[Pasted image 20250206222149.png]]
Culling Bias 剔除偏差¶
如果保证被覆盖，则可以剔除一些总是被覆盖的阴影投射物 ![[Pasted image 20250206222337.png]]![[Pasted image 20250206222345.png]]
阴影模式¶
![[Pasted image 20250206224604.png]]