가짜 리플렉션

Shader "Custom/fake_reflection"
{
	Properties
	{
	_MainTex("Albedo (RGB)", 2D) = "white" {}
	_NormalMap("NormalMap", 2D) = "bump" {}
	_reflect("reflect", Range(-1,1)) = 0.9
	_CubeMap("CubeMap", cube) = "" {}
	}
		SubShader
	{
		Tags{ "RenderType" = "Opaque" }

		CGPROGRAM
#pragma surface surf Lambert 
#pragma target 3.0

		sampler2D _MainTex, _NormalMap;
		samplerCUBE _CubeMap;
		float _reflect;

	struct Input
	{
		float2 uv_MainTex, uv_NormalMap;
		float3 worldRefl;
		INTERNAL_DATA
	};

	void surf(Input IN, inout SurfaceOutput o)
	{
		fixed4 c = tex2D(_MainTex, IN.uv_MainTex);

		o.Normal = UnpackNormal(tex2D(_NormalMap, IN.uv_NormalMap));

		o.Albedo = c.rgb;
		o.Emission = texCUBE(_CubeMap, WorldReflectionVector(IN, o.Normal))*_reflect;

		o.Alpha = c.a;
	}
	ENDCG
	}
		FallBack "Diffuse"
}

큐브맵이 있어야 작동한다.