A cutting the display of the shader object, set up a "Queue"="Transparent" will such (pictured),
Feeling is caused by deep inspection, but even the depth detection, in the various parameters, there are still problems.


If change the tag to a "Queue"="AlphaTest.". Covering the inside and may not be able to show... Understand.


Shader code as follows.. The great spirit guide...

 

Shader LCC/Bumped "Diffuse" {
The Properties {
_Color (" Main Color ", Color)=(1,1,1,1) 
_MainTex (" Base (RGB) Gloss "(A), 2 d)=" white "{} 
_Illum (" Illumin "(A), 2 d)=" white "{} 
_BumpMap (" Normalmap ", 2 d)="bump" {} 
_EmissionLM (" Emission (Lightmapper) ", Float)=0 
_ForwardLength (" Forward ", Float)=0 
} 
SubShader {
Tags {" Queue "=" AlphaTest "" IgnoreProjector"="True" "RenderType"="Transparent"} 
Cull off 
//ZWrite off 
//ZTest LEqual 

CGPROGRAM 
# pragma surface surf Lambert alpha vertex: vert 

Sampler2D _MainTex; 
Sampler2D _BumpMap; 
Sampler2D _Illum; 
Fixed4 _Color; 
Float _ForwardLength; 

Struct Input {
Float2 uv_MainTex; 
Float2 uv_Illum; 
Float2 uv_BumpMap; 
Float3 vertPos; 
}; 

Void vert (inout appdata_full v, out Input o {
UNITY_INITIALIZE_OUTPUT (Input, o); 
O.v ertPos=v.v ertex; 
} 
Void surf (Input IN and inout SurfaceOutput o {
Fixed4 Tex=tex2D (_MainTex, IN uv_MainTex); 
Fixed4 c=Tex * _Color; 
O.A lbedo=c.r gb; 
O.E mission=c.r gb * tex2D (_Illum, IN. Uv_Illum). A; 
O.N ormal=UnpackNormal (tex2D (_BumpMap, IN uv_BumpMap)); 

If (IN) vertPos) z> _ForwardLength) {
O.A lpha=c.a.; 
} else {
O.A lpha=0; 
} 
} 
ENDCG 
} 
FallBack "Self - Illumin/Diffuse" 
}