shaders question,shaders question !

I have a half sphere that i want to make the inside visible only when someone is gonna be in it. Like from the outside, it looks like there is nothing, but inside we can see the textures. i hav find one that is working, but only with colors. I want to be able to choose my textures for the insidee

 Shader "Custom/InsideShader" {
      Properties {
          _InsideColor ("Inside Color", Color) = (1,0,0,1)
          _OutsideColor ("Outside Color", Color) = (0,0,1,0.2)
                  _MainTex ("MainTex", 2D) = "white" {}
         _Tint ("Tint", Range(0, 1)) = 0
         _OutlineWidth ("Outline Width", Range(0, 0.001)) = 0
         _ShadowTint ("Shadow Tint", Color) = (0.5,0.5,0.5,1)
         _RotateSpeed ("Rotate Speed", Float ) = 1
         _OverlayTexture ("Overlay Texture", 2D) = "white" {}
      }
  SubShader {
          Tags { "Queue"="Transparent" "RenderType"="Transparent" }
          Blend SrcAlpha OneMinusSrcAlpha 
          ZWrite Off
          Pass {
              Cull Back
              Stencil {
                  Ref 2
                  Comp always
                  Pass replace
              }            
              CGPROGRAM
              #pragma vertex vert
              #pragma fragment frag
              fixed4 _OutsideColor;
              float4 vert(float4 v:POSITION) : SV_POSITION {
                  return UnityObjectToClipPos (v);
              }
              fixed4 frag() : COLOR {
                  return _OutsideColor;
              }
              ENDCG
          }
          Pass {
              Cull Front
              Stencil {
                  Ref 2
                  Comp NotEqual
                  Pass Zero
              }            
              CGPROGRAM
              #pragma vertex vert
              #pragma fragment frag
              fixed4 _InsideColor;
              float4 vert(float4 v:POSITION) : SV_POSITION {
                  return UnityObjectToClipPos (v);
              }
              fixed4 frag() : COLOR {
                  return _InsideColor;
              }
              ENDCG
          }
      }
      FallBack "Diffuse"
  }
 

,I have a half sphere that i want to put a shaders tahts gonna make the inside visible but the outside not visible. I've find one code to be able to get the result, but i want to put a textures in the inside of the sphere. Any help ?

 Shader "Custom/InsideShader" {
      Properties {
          _InsideColor ("Inside Color", Color) = (1,0,0,1)
          _OutsideColor ("Outside Color", Color) = (0,0,1,0.2)
                  _MainTex ("MainTex", 2D) = "white" {}
         _Tint ("Tint", Range(0, 1)) = 0
         _OutlineWidth ("Outline Width", Range(0, 0.001)) = 0
         _ShadowTint ("Shadow Tint", Color) = (0.5,0.5,0.5,1)
         _RotateSpeed ("Rotate Speed", Float ) = 1
         _OverlayTexture ("Overlay Texture", 2D) = "white" {}
      }
  SubShader {
          Tags { "Queue"="Transparent" "RenderType"="Transparent" }
          Blend SrcAlpha OneMinusSrcAlpha 
          ZWrite Off
          Pass {
              Cull Back
              Stencil {
                  Ref 2
                  Comp always
                  Pass replace
              }            
              CGPROGRAM
              #pragma vertex vert
              #pragma fragment frag
              fixed4 _OutsideColor;
              float4 vert(float4 v:POSITION) : SV_POSITION {
                  return UnityObjectToClipPos (v);
              }
              fixed4 frag() : COLOR {
                  return _OutsideColor;
              }
              ENDCG
          }
          Pass {
              Cull Front
              Stencil {
                  Ref 2
                  Comp NotEqual
                  Pass Zero
              }            
              CGPROGRAM
              #pragma vertex vert
              #pragma fragment frag
              fixed4 _InsideColor;
              float4 vert(float4 v:POSITION) : SV_POSITION {
                  return UnityObjectToClipPos (v);
              }
              fixed4 frag() : COLOR {
                  return _InsideColor;
              }
              ENDCG
          }
      }
      FallBack "Diffuse"
  }