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Assets/Particles/Explosion/flash_Shader.shader

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+Shader "Unlit/Flash_Shader"
+{
+    Properties
+    {
+        _MainTex ("Texture", 2D) = "white" {}
+		_Cols("Columns", Float)=2
+		_Rows("Rows", Float)=2
+    }
+    SubShader
+    {
+		Tags { "RenderType" = "Transparent" "Queue" = "Transparent" }
+		Blend SrcAlpha OneMinusSrcAlpha
+		Zwrite Off
+		LOD 100
+
+        Pass
+        {
+            CGPROGRAM
+            #pragma vertex vert
+            #pragma fragment frag
+            // make fog work
+            #pragma multi_compile_fog
+
+            #include "UnityCG.cginc"
+
+            struct appdata
+            {
+                float4 vertex : POSITION;
+                float4 uv : TEXCOORD0;
+				float4 color : COLOR;
+				float4 custom : TEXCOORD1;
+            };
+
+            struct v2f
+            {
+                float2 uv : TEXCOORD0;
+                UNITY_FOG_COORDS(1)
+                float4 vertex : SV_POSITION;
+				float age : TEXCOORD1;
+				float variance : TEXCOORD2;
+				float4 color : COLOR;
+            };
+
+            sampler2D _MainTex;
+            float4 _MainTex_ST;
+			float _Cols;
+			float _Rows;
+
+            v2f vert (appdata v)
+            {
+                v2f o;
+                o.vertex = UnityObjectToClipPos(v.vertex);
+				o.uv = v.uv.xy;
+				o.color = v.color;
+				o.age = v.uv.z;
+				o.variance = v.uv.w;
+                UNITY_TRANSFER_FOG(o,o.vertex);
+                return o;
+            }
+
+            fixed4 frag (v2f i) : SV_Target
+            {
+                // sample the texture
+				float index = floor(_Time.y+1234*i.variance);
+                fixed4 col = tex2D(_MainTex, i.uv*float2(  1/_Cols , 1/_Rows) + float2(1/_Cols*(index%(_Cols)), 1/_Rows*floor(index/_Rows)));
+                // apply fog
+                UNITY_APPLY_FOG(i.fogCoord, col);
+                return fixed4(i.color.rgb, i.color.a*col.r);
+            }
+            ENDCG
+        }
+    }
+}