一些特效

Packages/NBPostProcessing/Shader/FullScreenDisturbance.shader

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+Shader "XuanXuan/FullScreenDisturbance"
+{
+    Properties
+    {
+        _Strength("Strength", Range(-0.2,0.2)) =0
+        _BaseMap("Base Map", 2D) = "white"
+        //_Mask("Mask", 2D) = "white"
+
+    }
+
+    // The SubShader block containing the Shader code.
+    SubShader
+    {
+        // SubShader Tags define when and under which conditions a SubShader block or
+        // a pass is executed.
+        Tags
+        {
+            "RenderType" = "Opaque" "RenderPipeline" = "UniversalPipeline"
+        }
+
+        Pass
+        {
+
+            stencil
+            {
+                Ref 1
+                Comp equal
+                Pass keep
+            }
+            HLSLPROGRAM
+            #include "Packages/com.unity.render-pipelines.core/ShaderLibrary/Common.hlsl"
+            #include "Packages/com.unity.render-pipelines.universal/ShaderLibrary/Core.hlsl"
+            // This line defines the name of the vertex shader.
+            #pragma vertex vert
+            // This line defines the name of the fragment shader.
+            #pragma fragment frag
+
+            Texture2D _BlitTexture;
+            SAMPLER(sampler_BlitTexture);
+            Texture2D _BaseMap;
+            SAMPLER(sampler_BaseMap);
+            Texture2D _Mask;
+            SAMPLER(simpler_Mask);
+            float _Strength;
+
+            struct Attributes
+            {
+                #if UNITY_ANY_INSTANCING_ENABLED
+                   uint instanceID : INSTANCEID_SEMANTIC;
+                #endif
+                uint vertexID : VERTEXID_SEMANTIC;
+            };
+
+            struct Varyings
+            {
+                float4 position : SV_POSITION;
+                float2 uv : TEXCOORD0;
+                #if UNITY_ANY_INSTANCING_ENABLED
+                uint instanceID : CUSTOM_INSTANCE_ID;
+                #endif
+            };
+
+
+            Varyings vert(Attributes input)
+            {
+                Varyings output;
+                output.position = GetFullScreenTriangleVertexPosition(input.vertexID, UNITY_NEAR_CLIP_VALUE);
+                output.uv = output.position.xy * 0.5 + 0.5;
+                return output;
+            }
+
+            float4 frag(Varyings packedInput):SV_TARGET
+            {
+                float2 baseUV = packedInput.position / _ScreenParams.xy;
+                float3 noise = SAMPLE_TEXTURE2D(_BaseMap, sampler_BaseMap, baseUV);
+                noise=lerp(0,noise,noise.b);
+                baseUV += noise.xy * _Strength;
+                return SAMPLE_TEXTURE2D(_BlitTexture, sampler_BlitTexture, baseUV);
+            }
+            ENDHLSL
+        }
+    }
+
+}