Shader "Hidden/Thermal1" {
	Properties{
		_MainTex("Base (RGB)", 2D) = "white" {}
		_OtherTex("Other (RGB)", 2D) = "white" {}
	}
		SubShader{
			Pass {
				CGPROGRAM
				#pragma vertex vert_img
				#pragma fragment frag
				#include "UnityCG.cginc"
				uniform sampler2D _MainTex;
				uniform sampler2D _OtherTex;
				float4 frag(v2f_img i) : COLOR {
					fixed4 renderTex = tex2D(_MainTex, i.uv);
					fixed4 OtherTex = tex2D(_OtherTex, i.uv);

					fixed gray1 = 0.2125 * renderTex.r + 0.7154 * renderTex.g + renderTex.b;
					fixed gray2 = 0.2125 * OtherTex.r + 0.7154 * OtherTex.g + OtherTex.b;

					fixed maxgr = gray1 * 0.1 * step(gray2, gray1) + gray2 * step(gray1, gray2);
					//fixed maxgr = max(gray1, gray2);
					fixed3 grayColor = float3(maxgr, maxgr, maxgr);

					float4 result = renderTex;
					result.rgb = grayColor;
					return result;

				}
				ENDCG
			}
	}
}