Shader "World Political Map/Demos/Combine"
{
	Properties
	{
		_MainTex ("Texture 1", 2D) = "white" {}
		_SecondTex ("Texture 2", 2D) = "white" {}
	}
	SubShader
	{
		Tags { "RenderType"="Opaque" }
		Cull Off
		ZWrite Off

		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, _SecondTex;

			v2f vert (appdata v)
			{
				v2f o;
				o.vertex = UnityObjectToClipPos(v.vertex);
				o.uv = v.uv;
				return o;
			}
			
			fixed4 frag (v2f i) : SV_Target
			{
				fixed4 col = tex2D(_MainTex, i.uv);
				fixed4 snd = tex2D(_SecondTex, i.uv);
				return lerp(col, snd * 2.0, snd.a);
			}
			ENDCG
		}
	}
}