Unity Particle Pack's Dissolve shader isn't working

I imported Unity's particle pack into my project because it has a cool dissolve shader which I was hoping to use in my game. In their example scene they use a material which is just a color, but the shader has fields for textures like any standard shader. The problem is when I place my textures into these fields nothing changes, no matter which texture I try. I don't know a thing about shader programming so I'm stumped. Here is the shader's code:

 // Upgrade NOTE: upgraded instancing buffer 'Props' to new syntax.
  
 Shader "Custom/Dissolve" {
     Properties {
         _Color ("Color", Color) = (1,1,1,1)
         [HDR]_Emission ("Emission", Color) = (0,0,0,0)
         _MainTex ("Albedo", 2D) = "white" {}
         _Normal ("Normal", 2D) = "bump" {}
         _MetallicSmooth ("Metallic (RGB) Smooth (A)", 2D) = "white" {}
         _AO ("AO", 2D) = "white" {}
         [HDR]_EdgeColor1 ("Edge Color", Color) = (1,1,1,1)
         _Noise ("Noise", 2D) = "white" {}
         [Toggle] _Use_Gradient ("Use Gradient?", Float) = 1
         _Gradient ("Gradient", 2D) = "white" {}
         _Glossiness ("Smoothness", Range(0,1)) = 0.5
         _Metallic ("Metallic", Range(0,1)) = 0.0
         [PerRendererData]_Cutoff ("Cutoff", Range(0,1)) = 0.0
         _EdgeSize ("EdgeSize", Range(0,1)) = 0.2
         _NoiseStrength ("Noise Strength", Range(0,1)) = 0.4
         _DisplaceAmount ("Displace Amount", Float) = 1.5
         _cutoff ("cutoff", Range(0,1)) = 0.0
  
        
     }
     SubShader {
         Tags { "Queue"="AlphaTest" "RenderType"="TransparentCutout" "IgnoreProjector"="True" }
         Cull Off
  
         LOD 200
        
         CGPROGRAM
  
         // Physically based Standard lighting model, and enable shadows on all light types
         #pragma surface surf Standard fullforwardshadows vertex:vert addshadow
  
         // Use shader model 3.0 target, to get nicer looking lighting
         #pragma target 3.0
         #pragma multi_compile __ _USE_GRADIENT_ON
  
         sampler2D _MainTex;
         sampler2D _Noise;
         sampler2D _Gradient;
         sampler2D _Normal;
         sampler2D _MetallicSmooth;
         sampler2D _AO;
  
         struct Input {
             float2 uv_Noise;
             float2 uv_MainTex;
             fixed4 color : COLOR0;
             float3 worldPos;
         };
  
  
         half _Glossiness, _Metallic, _Cutoff, _EdgeSize, _NoiseStrength, _DisplaceAmount;
         half _cutoff;
         half4 _Color, _EdgeColor1, _Emission;
  
  
         void vert (inout appdata_full v, out Input o) {
             UNITY_INITIALIZE_OUTPUT(Input,o);
             float3 pos = mul((float3x3)unity_ObjectToWorld, v.vertex.xyz);
             //pos.x += _cutoff*5;
             float4 tex = tex2Dlod(_Noise, float4(pos, 0)*0.5);
    
  
  
             float4 Gradient = tex2Dlod (_Gradient, float4(v.texcoord.xy,0,0));
             float mask = smoothstep(_Cutoff, _Cutoff - 0.3, 1-Gradient);
  
  
             float displacementAmount = lerp(0, _DisplaceAmount, _cutoff);
             //v.vertex.xyz += mul((float3x3)unity_WorldToObject, float3(0, vertexOffset, 0));
             //v.vertex.xyz = lerp(v.vertex.xyz , float3(0,0,0), clamp(_cutoff * (tex.r+0.1) * displacementAmount, 0, 1));
           }
  
         // Add instancing support for this shader. You need to check 'Enable Instancing' on materials that use the shader.
         // See https://docs.unity3d.com/Manual/GPUInstancing.html for more information about instancing.
         // #pragma instancing_options assumeuniformscaling
         UNITY_INSTANCING_BUFFER_START(Props)
             // put more per-instance properties here
         UNITY_INSTANCING_BUFFER_END(Props)
  
         void surf (Input IN, inout SurfaceOutputStandard o) {
             half3 Noise = tex2D (_Noise, IN.uv_Noise);
             Noise.r = lerp(0, 1, Noise.r);
             half4 MetallicSmooth = tex2D (_MetallicSmooth, IN.uv_MainTex);
             _cutoff  = lerp(0, _cutoff + _EdgeSize, _cutoff);
  
             #if _USE_GRADIENT_ON
             half3 Gradient = tex2D (_Gradient, IN.uv_MainTex);
             half Edge = smoothstep(_Cutoff, _Cutoff - _EdgeSize, 1-(Gradient + Noise.r*(1-Gradient)*_NoiseStrength));
             #else
             half Edge = smoothstep(_cutoff + _EdgeSize, _cutoff, clamp(Noise.r, _EdgeSize, 1));
             #endif
  
             fixed4 c = tex2D (_MainTex, IN.uv_MainTex);
             fixed3 EmissiveCol = c.a * _Emission;
  
             o.Albedo = _Color;
             o.Occlusion = tex2D (_AO, IN.uv_MainTex);
             o.Emission = EmissiveCol + _EdgeColor1 * Edge;
             o.Normal = UnpackNormal (tex2D (_Normal, IN.uv_MainTex));
             o.Metallic = MetallicSmooth.r * _Metallic;
             o.Smoothness = MetallicSmooth.a * _Glossiness;
             clip(Noise - _cutoff);
         }
         ENDCG
     }
     FallBack "Diffuse"
 }