Unity Shader with RectMask2D Clipping

Shader "Shader Forge/UiShine" {
    Properties {
        [PerRendererData]_MainTex ("MainTex", 2D) = "white" {}
        _Color ("Color", Color) = (1,1,1,1)
        _ShineTex ("ShineTex", 2D) = "white" {}
        _time ("time", Range(0, 1)) = 0
        [HideInInspector]_Cutoff ("Alpha cutoff", Range(0,1)) = 0.5
        [MaterialToggle] PixelSnap ("Pixel snap", Float) = 0
        _Stencil ("Stencil ID", Float) = 0
        _StencilReadMask ("Stencil Read Mask", Float) = 255
        _StencilWriteMask ("Stencil Write Mask", Float) = 255
        _StencilComp ("Stencil Comparison", Float) = 8
        _StencilOp ("Stencil Operation", Float) = 0
        _StencilOpFail ("Stencil Fail Operation", Float) = 0
        _StencilOpZFail ("Stencil Z-Fail Operation", Float) = 0
    }
    SubShader {
        Tags {
            "IgnoreProjector"="True"
            "Queue"="Transparent"
            "RenderType"="Transparent"
            "CanUseSpriteAtlas"="True"
            "PreviewType"="Plane"
        }
        Pass {
            Name "FORWARD"
            Tags {
                "LightMode"="ForwardBase"
            }
            Blend One OneMinusSrcAlpha
            Cull Off
            ZWrite Off

            CGPROGRAM
            #pragma vertex vert
            #pragma fragment frag
            #define UNITY_PASS_FORWARDBASE
            #pragma multi_compile _ PIXELSNAP_ON
            #include "UnityCG.cginc"
            #include "UnityUI.cginc"
            #pragma multi_compile_fwdbase
            #pragma only_renderers d3d9 d3d11 glcore gles gles3 metal n3ds wiiu
            #pragma target 3.0
            uniform sampler2D _MainTex; uniform float4 _MainTex_ST;
            uniform float4 _Color;
            uniform sampler2D _ShineTex; uniform float4 _ShineTex_ST;
            uniform float _time;
            float4 _ClipRect;

            struct VertexInput {
                float4 vertex : POSITION;
                float2 texcoord0 : TEXCOORD0;
                float4 vertexColor : COLOR;
            };
            struct VertexOutput {
                float4 pos : SV_POSITION;
                float2 uv0 : TEXCOORD0;
                float4 vertexColor : COLOR;
                float4 projPos : TEXCOORD1;
                float4 worldPos : TEXCOORD2;
            };
            VertexOutput vert (VertexInput v) {
                VertexOutput o = (VertexOutput)0;
                o.uv0 = v.texcoord0;
                o.vertexColor = v.vertexColor;
                o.pos = UnityObjectToClipPos(v.vertex);
                #ifdef PIXELSNAP_ON
                    o.pos = UnityPixelSnap(o.pos);
                #endif
                o.projPos = ComputeScreenPos(o.pos);
                COMPUTE_EYEDEPTH(o.projPos.z);

                o.worldPos = v.vertex;

                return o;
            }
            float4 frag(VertexOutput i, float facing : VFACE) : COLOR {
                float isFrontFace = ( facing >= 0 ? 1 : 0 );
                float faceSign = ( facing >= 0 ? 1 : -1 );
                float2 sceneUVs = (i.projPos.xy / i.projPos.w);
////// Lighting:
////// Emissive:
                float2 node_1790 = (sceneUVs.rg+_time*float2(1,0));
                float4 _ShineTex_var = tex2D(_ShineTex,TRANSFORM_TEX(node_1790, _ShineTex));
                float4 _MainTex_var = tex2D(_MainTex,TRANSFORM_TEX(i.uv0, _MainTex));
                float node_603 = (_MainTex_var.a*i.vertexColor.a); // A
                float3 emissive = (((_ShineTex_var.rgb*i.vertexColor.rgb*_Color.a)+(_MainTex_var.rgb*(i.vertexColor.rgb*_Color.rgb)))*node_603);
                float3 finalColor = emissive;
                return fixed4(finalColor, node_603 * UnityGet2DClipping(i.worldPos.xy, _ClipRect));
            }
            ENDCG
        }
        Pass {
            Name "ShadowCaster"
            Tags {
                "LightMode"="ShadowCaster"
            }
            Offset 1, 1
            Cull Off

            CGPROGRAM
            #pragma vertex vert
            #pragma fragment frag
            #define UNITY_PASS_SHADOWCASTER
            #pragma multi_compile _ PIXELSNAP_ON
            #include "UnityCG.cginc"
            #include "Lighting.cginc"
            #pragma fragmentoption ARB_precision_hint_fastest
            #pragma multi_compile_shadowcaster
            #pragma only_renderers d3d9 d3d11 glcore gles gles3 metal n3ds wiiu
            #pragma target 3.0
            struct VertexInput {
                float4 vertex : POSITION;
            };
            struct VertexOutput {
                V2F_SHADOW_CASTER;
            };
            VertexOutput vert (VertexInput v) {
                VertexOutput o = (VertexOutput)0;
                o.pos = UnityObjectToClipPos( v.vertex );
                #ifdef PIXELSNAP_ON
                    o.pos = UnityPixelSnap(o.pos);
                #endif
                TRANSFER_SHADOW_CASTER(o)
                return o;
            }
            float4 frag(VertexOutput i, float facing : VFACE) : COLOR {
                float isFrontFace = ( facing >= 0 ? 1 : 0 );
                float faceSign = ( facing >= 0 ? 1 : -1 );
                SHADOW_CASTER_FRAGMENT(i)
            }
            ENDCG
        }
    }
    FallBack "Diffuse"
    CustomEditor "ShaderForgeMaterialInspector"
}