Simple unlit burn effect unity shader

Unlit_DissolveCutout.shader

Shader "Unlit/Dissolve Cutout"
{
	Properties
	{
		_Color ("Color", Color) = (1, 1, 1, 1)
		_MainTex ("Base (RGB)", 2D) = "white" { }
		_Dissolve ("Dissolve (A)", 2D) = "white" { }
		_EdgeColor ("Edge Color", Color) = (1, 1, 1, 1)
		_EdgeSize ("Edge Size", Range(0, 1)) = 0.5
	}
	SubShader
	{
		Tags { "Queue" = "AlphaTest" "IgnoreProjector" = "True" "RenderType" = "TransparentCutout" }
		LOD 100
		
		Lighting Off
		
		Pass
		{
			CGPROGRAM
			
			#pragma vertex vert
			#pragma fragment frag
			#pragma target 2.0
			#pragma multi_compile_fog
			
			#include "UnityCG.cginc"
			
			struct appdata_t
			{
				float4 vertex: POSITION;
				float2 texcoord: TEXCOORD0;
			};
			
			struct v2f
			{
				float4 vertex: SV_POSITION;
				float2 texcoord: TEXCOORD0;
			};
			
			float4 _Color;
			sampler2D _MainTex;
			float4 _MainTex_ST;
			sampler2D _Dissolve;
			fixed _EdgeSize;
			float4 _EdgeColor;
			
			v2f vert(appdata_t v)
			{
				v2f o;
				o.vertex = UnityObjectToClipPos(v.vertex);
				o.texcoord = TRANSFORM_TEX(v.texcoord, _MainTex);
				return o;
			}
			
			fixed4 frag(v2f i): SV_Target
			{
				fixed4 col = tex2D(_MainTex, i.texcoord) * _Color;
				half cutoff = 1 - _Color.a;
				half dissolve = tex2D(_Dissolve, i.texcoord).rgb - cutoff;
				
				if (col.a < 0.1)
				{
					clip(col.a - 0.1);
				}
				else
				{
					clip(dissolve);
				}
				
				if(dissolve < _EdgeSize && cutoff > 0)
				{
					col.rgb = _EdgeColor;
				}
				
				col.a = dissolve;
				return col;
			}
			ENDCG
			
		}
	}
}