Make a seethrough window without making hole in the Wall

Hello,
I would like to make window (probably with some special shader) which will hide that part of the wall where that window is placed but I will be able to see other walls behind that wall. So basically i want to create realistic window without having to cut hole into the wall.
I have been searching on the internet but I havent found anything good :/

 

Try creating a material with this shader and assigning it to your "window" mesh: https://alastaira.wordpress.com/2013/12/21/glass-shader/

 

Thanks, but what I need is to have object that not only acts like window but I need it to hide part of the wall where the window is as well

 

That's kind of a tough one. I mean, the easy way would be to have two separate models where one has a window and the other doesn't.

If you require it to be more dynamic, where the window can be placed anywhere on the wall, then I think you're going to have to do something a lot more complicated. Chances are pretty good that you're not going to find anyone who has done this before. I mean it has almost certainly been done before, but finding someone who did it is likely impossible.

I would probably approach it with a dynamic mask. I'm not at all good with the stencil buffer, but that's probably where the answer lies.

You could perhaps construct a texture at runtime to take the silhouette of the window and use that as an alpha channel map.

 

I have found something. Now i can see through the window but when I look through the window on another window I can not see through second window and also when i look through one window and there is wall and second window is behind the wall I can still see that window as grey plane :/

Here is my code

Window shader:

Code (CSharp):

1. Shader "Custom/Window" {
2.     Properties {
3.         _MainTex ("Base (RGB)", 2D) = "white" {}
4.         _StencilVal ("stencilVal", Int) = 1
5.     }
6.     SubShader {
7.         Tags { "RenderType"="Opaque" }
8.         LOD 200
9.        
10.         ZWrite Off
11.          ColorMask 0
12.    
13.          Pass {
14.              Stencil {
15.                  Ref [_StencilVal]
16.                  Comp NotEqual //always
17.                  Pass replace
18.              }
19.          }
20.  
21.         CGPROGRAM
22.         #pragma surface surf Lambert
23.  
24.         sampler2D _MainTex;
25.  
26.         struct Input {
27.             float2 uv_MainTex;
28.         };
29.  
30.         void surf (Input IN, inout SurfaceOutput o) {
31.             half4 c = tex2D (_MainTex, IN.uv_MainTex);
32.             o.Albedo = c.rgb;
33.             o.Alpha = c.a;
34.         }
35.         ENDCG
36.     }
37.     FallBack "Diffuse"
38. }

Walls shader:

Code (CSharp):

1. Shader "Custom/Rest" {
2.     Properties {
3.         _MainTex ("Base (RGB)", 2D) = "white" {}
4.         _Color ("Color", Color) = (1, 0, 0, 1)
5.         _StencilVal ("stencilVal", Int) = 1
6.     }
7.     SubShader {
8.         Tags { "RenderType"="Opaque" }
9.         LOD 200
10.  
11.         Stencil {
12.             Ref [_StencilVal]
13.             Comp NotEqual
14.         }
15.        
16.         CGPROGRAM
17.         #pragma surface surf Lambert
18.  
19.         sampler2D _MainTex;
20.         uniform fixed4 _Color;
21.  
22.         struct Input {
23.             float2 uv_MainTex;
24.         };
25.  
26.         void surf (Input IN, inout SurfaceOutput o) {
27.             half4 c = tex2D (_MainTex, IN.uv_MainTex) * _Color;
28.             o.Albedo = c.rgb;
29.             o.Alpha = c.a;
30.         }
31.         ENDCG
32.     }
33.     FallBack "Diffuse"
34. }

I set the stencilVal through script so every wall without window has stencilVal equal to 1 and every other wall where is window has its own stencilVal (2 - 255)

Here it is working fine


Below you can see that i can not look through two windows


I would like to be able so see through all the windows when I look at them as on the prevoius image but I can not find any solution.

 

Thanks for share your code! If i find a solution for the second window i will share it in return.

 

Hello, thanks you very much for your shaders. I was searching a lot, and your code is the best one i found. I'll use it to hide part of the animated windshield texture to imitate windshield wipers rain cleaning. But there is one problem - no shadows behind this window, no solution for this?

 

Hi, were you able to make it work properly and reolve the issue you were getting. I am also trying to make something like this. Please help