【边缘带光的溶解效果】

下面是Shader代码：

Shader "VP/Tests/Shader02"
{
    Properties {
        _BaseTexture("纹理",2d) = "" {}
        _DissolveNoiseTexture("溶解噪波图",2d) = "" {}
        _DissolveWidth("溶解边缘大小", float) = 2
        _DissolveFade("消散进度0~1",Range(0,1)) = 0.5
        [HDR]_FullGlowDissolveEdgeColor("溶解颜色",Color) = (11,0.6,0.6,0)
    }

    SubShader {
        Tags {
            "Queue" = "Transparent"
            "Rendertype" = "Transparent"
            "ForceNoShadowCasting" = "True"             // 不捕获阴影
            "IgnoreProjector"= "True"                   // 不响应投射器
        }
        Pass {
            Name "FORWARD"
            Tags {
                "LightMode" = "ForwardBase"
            }
            Blend One OneMinusSrcAlpha
            CGPROGRAM
            #include "UnityCG.cginc"
            #pragma target 3.0
            #pragma multi_compile_fwdbase_fullshadows
            #pragma vertex vert
            #pragma fragment frag

            uniform sampler2D _BaseTexture;
            uniform sampler2D _DissolveNoiseTexture; uniform float4 _DissolveNoiseTexture_ST;
            uniform float _DissolveWidth;
            uniform float _DissolveFade;
            uniform float3 _FullGlowDissolveEdgeColor;

            struct VertexInput
            {
                float4 vertex:POSITION;
                float2 uv0:TEXCOORD0;
                float2 noiseuv:TEXCOORD1;
            };

            struct VertexOutput
            {
                float4 pos:SV_POSITION;
                float2 uv0:TEXCOORD0;
                float2 noiseuv:TEXCOORD1;
            };

            VertexOutput vert(VertexInput i)
            {
                VertexOutput o = (VertexOutput)0;
                o.uv0 = i.uv0;
                o.pos = UnityObjectToClipPos(i.vertex);
                o.noiseuv = TRANSFORM_TEX(i.noiseuv,_DissolveNoiseTexture);
                return o;
            }

            float4 frag(VertexOutput i):COLOR
            {
                float4 baseColor = tex2D(_BaseTexture,i.uv0);
                float4 noisecolor = tex2D(_DissolveNoiseTexture,i.noiseuv);
                float isShow = step( noisecolor.r , _DissolveFade );
                float dissolveVal = max( ( _DissolveFade * _DissolveWidth ) , 0.001 );
                float4 resultColor = float4(( ( (_FullGlowDissolveEdgeColor).rgb * ( isShow - step( noisecolor , ( ( _DissolveFade * ( 1.01 + dissolveVal ) ) - dissolveVal ) ) ) ) + baseColor.rgb ) , baseColor.a * isShow);
                //return resultColor;
                float4 c = resultColor * baseColor;
                c.rgb *= c.a;
                return c;
            }

            ENDCG
        }
    }
    Fallback "Diffuse"
}

下面是测试用素材图：