Unity Shader 剔除黑色背景

网上找的，经测会有黑边，剔除的不干净

Shader "Esfog/FilterBlack" {  
Properties {  
_MainTex ("Base (RGB)", 2D) = "white" {}  
}  
SubShader   
{  
Tags { "RenderType"="Opaque" }  
//LOD 200  
Cull Off  
ZWrite Off  
Blend SrcAlpha OneMinusSrcAlpha  
Pass  
{  
CGPROGRAM  
#pragma vertex vert  
#pragma fragment frag  
#include "UnityCG.cginc"  
uniform sampler2D _MainTex;  
struct VertexOutput  
{  
float4 pos:SV_POSITION;  
float4 uv:TEXCOORD0;  
};  


VertexOutput vert(float4 vertex:POSITION,float4 uv:TEXCOORD0)  
{  
VertexOutput o;  
o.pos = mul(UNITY_MATRIX_MVP,vertex);  
o.uv = uv;  
return o;  
}  


float4 frag(VertexOutput i):COLOR  
{  
float4 col;  
col.rgba = tex2D(_MainTex,i.uv.xy);  
col.a = 1;  
if(col.r + col.g + col.b == 0)  
{  
col.a = 0;  
}  
return col;  
}  


ENDCG  
}  

}   
FallBack "Diffuse"  
}

自己的 

效果测试还不错，下边这个是单面显示，上面那个测试是双面显示的

Shader "Custom/MaskBlack" {  
    Properties {  
        _MainTex ("Base (RGB)", 2D) = "white" {}  
        _MaskValue("Mask Value(0-1)",Range(0,1)) = 0.1  
    }  
    SubShader {  
        Tags { "RenderType"="Transparent" }  
        LOD 200  

        CGPROGRAM  
        #pragma surface surf Lambert alpha  

        sampler2D _MainTex;  
        float _MaskValue;  

        struct Input {  
            float2 uv_MainTex;  
        };  

        void surf (Input IN, inout SurfaceOutput o) {  
            half4 c = tex2D (_MainTex, IN.uv_MainTex);  
                if(c.r+c.g+c.b<_MaskValue){  
                 c.a=0;  
                }  
            o.Albedo = c.rgb;  
            o.Alpha = c.a;  
        }  
        ENDCG  
    }   
    FallBack "Diffuse"  
}