Question Dissolve Surface Shader on Texture

Hello there, I am a newbie when it comes to Shaders, so I'm trying to create a Dissolve effect that basically dissolves from nothing to showing a 2D Texture.
The problem I have is that the material renders as black, then it dissolves to show the texture.
This is my current Shader code:

Code (CSharp):

1. Shader "Dissolve" {
2.     Properties {
3.         _Color ("Color", Color) = (1,1,1,1)
4.         _MainTex ("Base (RGB)", 2D) = "white" {}
5.         _DissolveMap ("Dissolve Map", 2D) = "white" {}
6.         _DissolveAmount ("DissolveAmount", Range(0,1)) = 0
7.         _DissolveColor ("DissolveColor", Color) = (1,1,1,1)
8.         _DissolveEmission ("DissolveEmission", Range(0,1)) = 1
9.         _DissolveWidth ("DissolveWidth", Range(0,0.1)) = 0.05
10.     }
11.     SubShader {
12.         Tags {"Queue"="Transparent" "IgnoreProjector"="True" "RenderType"="Transparent"}
13.         Lighting Off
14.         ZWrite Off
15.         Blend SrcAlpha OneMinusSrcAlpha
16.         Cull Off
17.         LOD 200
18.  
19.          Pass{
20.              SetTexture [_MainTex] {combine texture}
21.         }
22.        
23.         CGPROGRAM
24.         #pragma surface surf Standard shadowsforwardshadow
25.         #pragma target 3.0
26.  
27.         sampler2D _MainTex;
28.         sampler2D _DissolveMap;
29.  
30.         struct Input {
31.             float2 uv_MainTex;
32.             float2 uv_DissolveMap;
33.         };
34.  
35.         half _DissolveAmount;
36.         half _DissolveEmission;
37.         half _DissolveWidth;
38.         fixed4 _Color;
39.         fixed4 _DissolveColor;
40.  
41.         void surf (Input IN, inout SurfaceOutputStandard o) {
42.  
43.             fixed4 c = tex2D (_MainTex, IN.uv_MainTex) * _Color;          
44.             fixed4 mask = tex2D (_DissolveMap, IN.uv_DissolveMap);
45.  
46.             if(mask.r < _DissolveAmount)
47.                 discard;
48.  
49.             o.Albedo = c.rgb;
50.  
51.             if(mask.r < _DissolveAmount + _DissolveWidth) {
52.                 o.Albedo = _DissolveColor;
53.                 o.Emission = _DissolveColor * _DissolveEmission;
54.             }
55.  
56.             o.Albedo = c.rgb;
57.             o.Alpha = _DissolveAmount;
58.  
59.            
60.            
61.         }
62.     }
63.     FallBack "Diffuse"
64. }
65.