Hello, I am wondering

Shader "Hidden/EdgeDetectGeometry" { Properties { _MainTex ("Base (RGB)", 2D) = "" {} _Color ("Color", color) = (0,0,0,1) }

 // Shader code pasted into all further CGPROGRAM blocks    
 CGINCLUDE
 
 #include "UnityCG.cginc"
 
 struct v2f {
     float4 pos : POSITION;
     float2 uv[5] : TEXCOORD0;
 };
 
 sampler2D _MainTex;
 uniform half4 _MainTex_TexelSize;
 sampler2D _CameraDepthNormalsTexture;
 
 uniform half4 sensitivity; 
 uniform half4 _BgColor;
 uniform half _BgFade;
 uniform float4 _Color;
 
 inline half CheckSame (half2 centerNormal, float centerDepth, half4 sample)
 {
     // difference in normals
     // do not bother decoding normals - there's no need here
     half2 diff = abs(centerNormal - sample.xy) * sensitivity.y;
     half isSameNormal = (diff.x + diff.y) * sensitivity.y < 0.1;
     // difference in depth
     float sampleDepth = DecodeFloatRG (sample.zw);
     float zdiff = abs(centerDepth-sampleDepth);
     // scale the required threshold by the distance
     half isSameDepth = zdiff * sensitivity.x < 0.09 * centerDepth;
 
     // return:
     // 1 - if normals and depth are similar enough
     // 0 - otherwise
     
     return isSameNormal * isSameDepth;
 }    
         
 v2f vertThin( appdata_img v )
 {
     v2f o;
     o.pos = mul (UNITY_MATRIX_MVP, v.vertex);
     


     
     float2 uv = v.texcoord.xy;
     o.uv[0] = uv;
     
     // On D3D when AA is used, the main texture & scene depth texture
     // will come out in different vertical orientations.
     // So flip sampling of depth texture when that is the case (main texture
     // texel size will have negative Y)
     
     #if SHADER_API_D3D9
     if (_MainTex_TexelSize.y < 0)
         uv.y = 1-uv.y;
     #endif
     
     o.uv[1] = uv;
     o.uv[4] = uv;
             
     // offsets for two additional samples
     o.uv[2] = uv + float2(-_MainTex_TexelSize.x, -_MainTex_TexelSize.y);
     o.uv[3] = uv + float2(+_MainTex_TexelSize.x, -_MainTex_TexelSize.y);
     o.pos.z +=0.1f;
     
     return o;
 }      
 
 
 half4 fragThin (v2f i) : COLOR
 {
     half4 original = tex2D(_MainTex, i.uv[0]);
     
     half4 center = tex2D (_CameraDepthNormalsTexture, i.uv[1]);
     half4 sample1 = tex2D (_CameraDepthNormalsTexture, i.uv[2]);
     half4 sample2 = tex2D (_CameraDepthNormalsTexture, i.uv[3]);
     
     // encoded normal
     half2 centerNormal = center.xy;
     // decoded depth
     float centerDepth = DecodeFloatRG (center.zw);
     
     half edge = 1.0;
     
     edge *= CheckSame(centerNormal, centerDepth, sample1);
     edge *= CheckSame(centerNormal, centerDepth, sample2);
         
     //return edge * lerp(original, _BgColor, _BgFade);
     if(edge > 0)
         return lerp(original, _BgColor, _BgFade);
     else
         return _Color;
 }
 
 ENDCG 
 

Subshader {

Pass {

    ZTest Always
   Cull Back 
   ZWrite On
   Fog { Mode off }      


   CGPROGRAM
   #pragma vertex vertThin
   #pragma fragment fragThin
   ENDCG

}

}

Fallback off

} // shader\

Hello, I used shader in the unity3d. But, I have some wrong this shader just for me. When I used this shader, you can show under the img. 125125

But, I want to make like a under the picture. these two plane show line.

9595

How can i fix this shader. If you can know, let me know plz. Thank for reading. And I'm sorry I can't write English very well.