官网有描边shader，但是是运行时才起效的ts文件，现在我把里面的核心部分复制到独立的 .shader文件里，但是效果不对

如图，描边部分完全遮盖了纹理部分，应该要设置描边部分的pass的cull=front吧，但是在 .shader中应该怎么写？
这个是 .shader部分的代码：

Shader3D Start

{
    type:Shader3D,
    name:myShader,
    enableInstancing:true,
    supportReflectionProbe:true,
    uniformMap:{
        u_OutlineLightness:{type:Float},
        u_OutlineColor:{type:Color},
        u_AlbedoTexture:{type:Texture2D},
        u_OutlineWidth:{type:Float}
    },
    defines: {
        ENABLEVERTEXCOLOR: { type: bool, default: false }
    }
    shaderPass:[
       
        {
            pipeline:Forward,
            VS:unlitVS,
            FS:unlitPS
        },
        {
            pipeline:Forward,
            VS:unlitVs2,
            FS:unlitPs2
        }
    ]
}

Shader3D End
GLSL Start
#defineGLSL unlitVS

    #include "Sprite3DVertex.glsl";    
    #include "VertexCommon.glsl";    
    #include "Camera.glsl";    
    void main()    
    {    
        Vertex vertex;    
        getVertexParams(vertex);    
        vec4 position = vec4((vertex.positionOS) + (vertex.normalOS) * u_OutlineWidth, 1.0);    
   
        mat4 worldMat = getWorldMatrix();    
        vec3 positionWS = (worldMat * vec4(position)).xyz;    
        gl_Position = getPositionCS(positionWS);    
        gl_Position = remapPositionZ(gl_Position);    
    }

#endGLSL
#defineGLSL unlitPS

    #if defined(GL_FRAGMENT_PRECISION_HIGH)    
        precision highp float;    
    #else      
        precision mediump float;    
    #endif       
    void main()      
    {      
        vec3 finalColor = u_OutlineColor.rgb * u_OutlineLightness;    
        gl_FragColor = vec4(finalColor,0.0);    
    }

#endGLSL
#defineGLSL unlitVs2

    #include "Camera.glsl";
    #include "Sprite3DVertex.glsl";
    #include "VertexCommon.glsl"; 
    varying vec3 v_Normal;
    varying vec2 v_Texcoord0; 
    void main()
    { 
        Vertex vertex;
        getVertexParams(vertex);
        mat4 worldMat = getWorldMatrix();
        vec3 positionWS = (worldMat * vec4(vertex.positionOS, 1.0)).xyz;
   
        gl_Position = getPositionCS(positionWS);
   
        v_Normal = normalize((worldMat * vec4(vertex.normalOS, 0.0)).xyz);
        v_Texcoord0 = vertex.texCoord0;
        gl_Position=remapPositionZ(gl_Position);
    }

#endGLSL
#defineGLSL unlitPs2

    #if defined(GL_FRAGMENT_PRECISION_HIGH)
    precision highp float;
    #else
    precision mediump float;
    #endif
    varying vec2 v_Texcoord0;
    varying vec3 v_Normal;
   
    void main()
    {
    vec4 albedoTextureColor = vec4(1.0);
       
    albedoTextureColor = texture2D(u_AlbedoTexture, v_Texcoord0);
    gl_FragColor = albedoTextureColor;
    }

#endGLSL
GLSL End