unity3d中加入shader后材质球的颜色变为黑色的问题

我想在unity中给cube添加轮廓线，从某个帖子中得知shader可以实现，还给了一段shader的代码，但是只要给材质球挂载上这个shader，轮廓是有了，但是材质球会变成黑色。麻烦各位大神给看看，是不是这个shader哪里写的有问题

 Shader "Custom/NewSurfaceShader" {
Properties {  
        //定义材质的颜色为白色  
        _Color ("Main Color", Color) = (1,1,1,1)  
        //定义材质的轮廓线为黑色  
        _OutlineColor ("Outline Color", Color) = (0,0,0,1)  //改变这个能改变轮廓边的颜色  
        //定义线宽  
        _Outline ("Outline width", Range (0.0, 0.03)) = 0.001   //改变这个能改变轮廓边的粗细  
        _MainTex ("Base (RGB)", 2D) = "white" { }  
    }  

CGINCLUDE  
#include "UnityCG.cginc"  

struct appdata {  
    float4 vertex : POSITION;  
    float3 normal : NORMAL;  
};  

struct v2f {  
    float4 pos : POSITION;  
    float4 color : COLOR;  
};  

uniform float _Outline;  
uniform float4 _OutlineColor;  

v2f vert(appdata v) {  
    // just make a copy of incoming vertex data but scaled according to normal direction  
    v2f o;  
    o.pos = mul(UNITY_MATRIX_MVP, v.vertex);  

    float3 norm   = mul ((float3x3)UNITY_MATRIX_IT_MV, v.normal);  
    float2 offset = TransformViewToProjection(norm.xy);  

    o.pos.xy += offset * o.pos.z * _Outline;  
    o.color = _OutlineColor;  
    return o;  
}  
ENDCG  

    SubShader {  
        Tags { "Queue" = "Transparent" }  

        // note that a vertex shader is specified here but its using the one above  
        Pass {  
            Name "OUTLINE"  
            Tags { "LightMode" = "Always" }  
            Cull Off  
            ZWrite Off  
            ZTest Always  
            ColorMask RGB // alpha not used  

            // you can choose what kind of blending mode you want for the outline  
            Blend SrcAlpha OneMinusSrcAlpha // Normal  
            //Blend One One // Additive  
            //Blend One OneMinusDstColor // Soft Additive  
            //Blend DstColor Zero // Multiplicative  
            //Blend DstColor SrcColor // 2x Multiplicative  

CGPROGRAM  
#pragma vertex vert  
#pragma fragment frag  

half4 frag(v2f i) :COLOR {  
    return i.color;  
}  
ENDCG  
        }  

        Pass {  
            Name "BASE"  
            ZWrite On  
            ZTest LEqual  
            Blend SrcAlpha OneMinusSrcAlpha  
            Material {  
                Diffuse [_Color]  
                Ambient [_Color]  
            }  
            Lighting On  
            SetTexture [_MainTex] {  
                ConstantColor [_Color]  
                Combine texture * constant  
            }  
            SetTexture [_MainTex] {  
                Combine previous * primary DOUBLE  
            }  
        }  
    }  

    SubShader {  
        Tags { "Queue" = "Transparent" }  

        Pass {  
            Name "OUTLINE"  
            Tags { "LightMode" = "Always" }  
            Cull Front  
            ZWrite Off  
            ZTest Always  
            ColorMask RGB  

            // you can choose what kind of blending mode you want for the outline  
            Blend SrcAlpha OneMinusSrcAlpha // Normal  
            //Blend One One // Additive  
            //Blend One OneMinusDstColor // Soft Additive  
            //Blend DstColor Zero // Multiplicative  
            //Blend DstColor SrcColor // 2x Multiplicative  

            CGPROGRAM  
            #pragma vertex vert  
            #pragma exclude_renderers gles xbox360 ps3  
            ENDCG  
            SetTexture [_MainTex] { combine primary }  
        }  

        Pass {  
            Name "BASE"  
            ZWrite On  
            ZTest LEqual  
            Blend SrcAlpha OneMinusSrcAlpha  
            Material {  
                Diffuse [_Color]  
                Ambient [_Color]  
            }  
            Lighting On  
            SetTexture [_MainTex] {  
                ConstantColor [_Color]  
                Combine texture * constant  
            }  
            SetTexture [_MainTex] {  
                Combine previous * primary DOUBLE  
            }  
        }  
    }  

    Fallback "Diffuse"  
}  

https://zhidao.baidu.com/question/326920896412288605.html

这个问题本身有点小问题 如果一个材质球没有shader的话就渲染出来将会去粉红色 你的问题所在原因很可能你没有选择正确的shader