유니티 셋팅

Assets/MeshBaker/Resources/Shaders/NormalMapShaderSwizzle.shader

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+Shader "MeshBaker/NormalMapShaderSwizzle"
+{
+	Properties
+	{
+		_MainTex("Texture", 2D) = "white" {}
+	}
+		SubShader
+	{
+		Tags { "RenderType" = "Opaque" }
+		LOD 100
+
+		Pass
+		{
+			CGPROGRAM
+			#pragma vertex vert
+			#pragma fragment frag
+
+			#include "UnityCG.cginc"
+
+			struct appdata
+			{
+				float4 vertex : POSITION;
+				float2 uv : TEXCOORD0;
+			};
+
+			struct v2f
+			{
+				float2 uv : TEXCOORD0;
+				float4 vertex : SV_POSITION;
+			};
+
+			sampler2D _MainTex;
+			float4 _MainTex_ST;
+
+			fixed4 ConvertNormalFormatFromUnity_ToStandard(fixed4 c) {
+				fixed4 n;
+				n.a = 0.0;
+				n.x = c.a * 2.0 - 1.0;
+				n.y = c.g * 2.0 - 1.0;
+				n.z = sqrt(1 - n.x * n.x - n.y * n.y);
+
+				//now repack in the regular format
+				fixed4 cc;
+				cc.a = 1.0;
+				cc.r = ((n.x + 1.0) * 0.5);
+				cc.g = ((n.y + 1.0) * 0.5);
+				cc.b = ((n.z + 1.0) * 0.5);
+				return cc;
+			}
+
+			v2f vert(appdata v)
+			{
+				v2f o;
+				o.vertex = UnityObjectToClipPos(v.vertex);
+				o.uv = TRANSFORM_TEX(v.uv, _MainTex);
+				return o;
+			}
+
+			fixed4 frag(v2f i) : SV_Target
+			{
+				// Sample the texture
+				fixed4 texColor = tex2D(_MainTex, i.uv);
+
+				// Swizzle the color channels
+				fixed4 swizzledColor = ConvertNormalFormatFromUnity_ToStandard(texColor);
+
+				return swizzledColor;
+			}
+
+		ENDCG
+	}
+	}
+}