R1

Assets/Shaders/Fear.shader

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+Shader "Custom/PostProcess" {
+  Properties {
+    _MainTex("Texture", 2D) = "white" {}
+    _Fear ("Fear", Float) = 100 
+  }
+
+  SubShader {
+    Pass {
+      CGPROGRAM
+      #pragma vertex vert_img
+      #pragma fragment frag
+      #include "UnityCG.cginc"
+
+      // Properties
+      sampler2D _MainTex;
+      float _Fear;
+
+      float4 frag(v2f_img input) : COLOR {
+        float4 baseCol = tex2D(_MainTex, input.uv);
+        float ratio = _Fear/100.f;
+        float inverseRatio = 1 - ratio;
+        float fearBaseColor = (baseCol.x + baseCol.y + baseCol.z) / 3;
+        baseCol = float4(baseCol.x * inverseRatio + fearBaseColor * ratio, baseCol.y * inverseRatio + fearBaseColor * ratio, baseCol.z * inverseRatio + fearBaseColor * ratio, 1.0);
+        float distFromCenter = distance(input.uv.xy, float2(0.5, 0.5)) * 4 * ratio;
+        return float4(1 - distFromCenter, 1 - distFromCenter, 1 - distFromCenter, 1.0) * baseCol;
+      }
+      ENDCG
+}}}

Assets/Shaders/Fear.shader.meta

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+fileFormatVersion: 2
+guid: 37e8fe914eb083bf39337914a4c653c7
+ShaderImporter:
+  externalObjects: {}
+  defaultTextures: []
+  nonModifiableTextures: []
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: