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Assets/Resources/Loading/LoadingToLeft.shader

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+Shader "Custom/LoadingToLeft"
+{
+    Properties
+    {
+        _MainTex ("Texture", 2D) = "white" { }
+        _Speed ("Speed", float) = 0.2
+
+
+        //MASK SUPPORT ADD
+        _StencilComp ("Stencil Comparison", Float) = 8
+        _Stencil ("Stencil ID", Float) = 0
+        _StencilOp ("Stencil Operation", Float) = 0
+        _StencilWriteMask ("Stencil Write Mask", Float) = 255
+        _StencilReadMask ("Stencil Read Mask", Float) = 255
+        _ColorMask ("Color Mask", Float) = 15
+        //MASK SUPPORT END
+    }
+    SubShader
+    {
+        Tags { "Queue" = "Transparent" }
+        //MASK SUPPORT ADD
+        Stencil
+        {
+            Ref [_Stencil]
+            Comp [_StencilComp]
+            Pass [_StencilOp]
+            ReadMask [_StencilReadMask]
+            WriteMask [_StencilWriteMask]
+        }
+        ColorMask [_ColorMask]
+        //MASK SUPPORT END
+
+        // No culling or depth
+        Cull Back
+        ZWrite Off
+
+        Pass
+        {
+            Blend SrcAlpha OneMinusSrcAlpha
+            CGPROGRAM
+            
+            #pragma vertex vert
+            #pragma fragment frag
+
+            #include "UnityCG.cginc"
+
+            struct appdata
+            {
+                float4 vertex: POSITION;
+                float2 uv: TEXCOORD0;
+            };
+
+            struct v2f
+            {
+                float2 uv: TEXCOORD0;
+                float4 vertex: SV_POSITION;
+            };
+
+            sampler2D _MainTex;
+            float4 _MainTex_ST;
+            float _Speed;
+
+            v2f vert(appdata v)
+            {
+                v2f o;
+                o.vertex = UnityObjectToClipPos(v.vertex);
+                o.uv = TRANSFORM_TEX(v.uv, _MainTex);//v.uv;
+                return o;
+            }
+
+            
+
+            fixed4 frag(v2f i): SV_Target
+            {
+                float2 uv = i.uv;
+                uv.x += _Time.x * _Speed;
+                fixed4 col = tex2D(_MainTex, uv);
+                return col;
+            }
+            
+            ENDCG
+            
+        }
+        
+    }
+}