Reflection Surface Shader examples in the Built-In Render Pipeline

Here’s a ShaderA program that runs on the GPU. More info
See in Glossary that does cubemapped reflection using built-in worldRefl input. It’s very similar to built-in Reflective/Diffuse Shader:

  Shader "Example/WorldRefl" {
    Properties {
      _MainTex ("Texture", 2D) = "white" {}
      _Cube ("Cubemap", CUBE) = "" {}
    }
    SubShader {
      Tags { "RenderType" = "Opaque" }
      CGPROGRAM
      #pragma surface surf Lambert
      struct Input {
          float2 uv_MainTex;
          float3 worldRefl;
      };
      sampler2D _MainTex;
      samplerCUBE _Cube;
      void surf (Input IN, inout SurfaceOutput o) {
          o.Albedo = tex2D (_MainTex, IN.uv_MainTex).rgb * 0.5;
          o.Emission = texCUBE (_Cube, IN.worldRefl).rgb;
      }
      ENDCG
    } 
    Fallback "Diffuse"
  }

Because it assigns the reflection color as Emission, we get a very shiny soldier:

If you want to do reflections that are affected by normal mapsA type of Bump Map texture that allows you to add surface detail such as bumps, grooves, and scratches to a model which catch the light as if they are represented by real geometry.
See in Glossary, it needs to be slightly more involved: INTERNAL_DATA needs to be added to the Input structure, and WorldReflectionVector function used to compute per-pixel reflection vector after you’ve written the Normal output.

  Shader "Example/WorldRefl Normalmap" {
    Properties {
      _MainTex ("Texture", 2D) = "white" {}
      _BumpMap ("Bumpmap", 2D) = "bump" {}
      _Cube ("Cubemap", CUBE) = "" {}
    }
    SubShader {
      Tags { "RenderType" = "Opaque" }
      CGPROGRAM
      #pragma surface surf Lambert
      struct Input {
          float2 uv_MainTex;
          float2 uv_BumpMap;
          float3 worldRefl;
          INTERNAL_DATA
      };
      sampler2D _MainTex;
      sampler2D _BumpMap;
      samplerCUBE _Cube;
      void surf (Input IN, inout SurfaceOutput o) {
          o.Albedo = tex2D (_MainTex, IN.uv_MainTex).rgb * 0.5;
          o.Normal = UnpackNormal (tex2D (_BumpMap, IN.uv_BumpMap));
          o.Emission = texCUBE (_Cube, WorldReflectionVector (IN, o.Normal)).rgb;
      }
      ENDCG
    } 
    Fallback "Diffuse"
  }

Here’s a normal-mapped shiny soldier: