[Unity URP] 深度图获取

在做原神渲染还原的时候一直想复刻等宽屏幕空间边缘光，但是获取的深度图一直是全黑的orz

其他可能的问题：

《Unity的URP项目中使用自定义shader导致材质消失的解决办法》-CSDN博客注意也是要use Normal那个pass

后来发现是受到unity版本的影响用的是unity 2021版

1）勾选depth texture

2）shader代码中

#include "Packages/com.unity.render-pipelines.universal/ShaderLibrary/DeclareDepthTexture.hlsl"

3）查看Packages/Universal RP/shader/Lit.shader

官方案例中获取深度的部分：（注意要复制depthnormal，depthonly不管用）

Pass
        {
            Name "DepthNormals"
            Tags{"LightMode" = "DepthNormals"}
 
            ZWrite On
            Cull[_Cull]
 
            HLSLPROGRAM
            #pragma exclude_renderers gles gles3 glcore
            #pragma target 4.5
 
            #pragma vertex DepthNormalsVertex
            #pragma fragment DepthNormalsFragment
 
            // -------------------------------------
            // Material Keywords
            #pragma shader_feature_local _NORMALMAP
            #pragma shader_feature_local _PARALLAXMAP
            #pragma shader_feature_local _ _DETAIL_MULX2 _DETAIL_SCALED
            #pragma shader_feature_local_fragment _ALPHATEST_ON
            #pragma shader_feature_local_fragment _SMOOTHNESS_TEXTURE_ALBEDO_CHANNEL_A
 
            //--------------------------------------
            // GPU Instancing
            #pragma multi_compile_instancing
            #pragma multi_compile _ DOTS_INSTANCING_ON
 
            #include "Packages/com.unity.render-pipelines.universal/Shaders/LitInput.hlsl"
            #include "Packages/com.unity.render-pipelines.universal/Shaders/LitDepthNormalsPass.hlsl"
            ENDHLSL
        }