15-3-MaskMap

Shader "Custom/15-3-MaskMap"
{
    Properties
    {
		_MainTex("Texture", 2D) = "white" {}
		_BumpMap("NormalMap (RGB)", 2D) = "white" {}	
		_MaskMap("MaskMap", 2D) = "white"{}
		_Cube("Cubemap", CUBE) = "" {}
    }
    SubShader
    {
		Tags { "RenderType" = "Opaque" }

		CGPROGRAM
		#pragma surface surf Lambert noambient

		struct Input
		{
			float2 uv_MainTex;
			float2 uv_BumpMap;
			float2 uv_MaskMap;
			float3 worldRefl;
			// 노멀맵에 반사처리르 할때
			INTERNAL_DATA
		};

		sampler2D _MainTex;
		sampler2D _BumpMap;
		sampler2D _MaskMap;
		samplerCUBE _Cube;

		void surf(Input IN, inout SurfaceOutput o)
		{
			o.Normal = UnpackNormal(tex2D(_BumpMap, IN.uv_BumpMap));
			fixed4 c = tex2D(_MainTex, IN.uv_MainTex);
			float4 re = texCUBE(_Cube, WorldReflectionVector(IN, o.Normal));
			float4 m = tex2D(_MaskMap, IN.uv_MaskMap);
			o.Albedo = c.rgb *(1 - m.r);
			o.Emission = re.rgb * m.r;
			o.Alpha = c.a;
		}
		ENDCG
    }
    FallBack "Diffuse"
}

검정색 부분은 마스크로 반사를 하지 않은 부분이다