Character visible through other objects

Ok, so the thing I'm trying to make is making unit visible through solid objects.
I write simple shader (I remove all unnecessary):

Spoiler: SubShader code

Code (CSharp):

1.  
2. SubShader {
3.                 Tags { "RenderType"="Opaque" "Queue" = "Geometry+1"}
4.                 LOD 200
5.                
6.                 Cull Back
7.                 ZWrite Off
8.                 ZTest Always
9.  
10.                 CGPROGRAM
11.                 #pragma surface surf Overlap decal:blend
12.                 #pragma target 3.0
13.                
14.                 sampler2D _OverlapText;
15.                 half4 _OverlapColor;
16.  
17.                 struct Input {
18.                         float2 uv_MainTex;
19.                 };
20.                
21.                 half4 LightingOverlap(SurfaceOutput o, half3 lightDir, half3 viewDir, half atten)
22.                 {              
23.                         half3 returnColor = o.Albedo;                  
24.                         return half4(returnColor, o.Alpha);                    
25.                 }
26.                
27.                 half4 LightingOverlap_PrePass(SurfaceOutput o, half4 light)
28.                 {
29.                         fixed4 c;
30.                         c.rgb = o.Albedo;
31.                         c.a = o.Alpha;                
32.                         return c;      
33.                 }
34.  
35.                 void surf (Input IN, inout SurfaceOutput o) {
36.                         half4 c = tex2D (_OverlapText, IN.uv_MainTex);
37.                         o.Albedo =  c.rgb * _OverlapColor.rgb;
38.                         o.Alpha = c.a * _OverlapColor.a;
39.                 }
40.                 ENDCG                  
41.                        
42.        
43.                 Cull Off
44.                 ZWrite on
45.                 ZTest LEqual
46.  
47.                 CGPROGRAM
48.                 #pragma surface surf Lambert
49.                 #pragma target 3.0
50.                
51.                 struct Input {
52.                         half2 uv_MainTex;
53.                         half3 viewDir;
54.                 };
55.  
56.                 void surf (Input IN, inout SurfaceOutput o) {
57.                        
58.                         half4 c = tex2D (_MainTex, IN.uv_MainTex);                    
59.                         o.Albedo = c.rgb * _Color.rgb;
60.                         o.Alpha = _Color.a * c.a;
61.                 }
62.                 ENDCG          
63.         }
64.  

That's what the goal looks like in forward renderer:

Thats fine! (Cubes queue is set to "Geometry")
Than I add another character:

Thats fine too! Spidys don't show through each other.
But when using deferred renderer shader is behaving unpredictably.
For example I set to Cubes are same shader ("Geometry+1"). And I see Spider Man number one throw Spider Man number two (it's wrong), but i dont see them throw cubes:

It looks to act completely random. What I'am doing wrong?

P.S. There is a chance that problem is due to the faulty Spidy model, since none of standart cubes or spheres were shown through each other with this shader.

 

I was just on this site and saw this shader that might be of some value.
http://wiki.unity3d.com/index.php?title=XRay

 

Yep. I agree with you... but I don't know how make two different pass in one Subshader with different queue... Or maybe how render object (with more than one submesh) with two materials without additional camera.