modified maps

modified maps

Assets/NatureStarterKit2/Standard Assets/Effects/ImageEffects/Shaders/BlendModesOverlay.shader

@@ -0,0 +1,135 @@
+// Upgrade NOTE: replaced 'mul(UNITY_MATRIX_MVP,*)' with 'UnityObjectToClipPos(*)'
+
+Shader "Hidden/BlendModesOverlay" {
+	Properties {
+		_MainTex ("Screen Blended", 2D) = "" {}
+		_Overlay ("Color", 2D) = "grey" {}
+	}
+	
+	CGINCLUDE
+
+	#include "UnityCG.cginc"
+	
+	struct v2f {
+		float4 pos : SV_POSITION;
+		float2 uv[2] : TEXCOORD0;
+	};
+			
+	sampler2D _Overlay;
+	sampler2D _MainTex;
+	
+	half _Intensity;
+	half4 _MainTex_TexelSize;
+	half4 _UV_Transform = half4(1, 0, 0, 1);
+		
+	v2f vert( appdata_img v ) { 
+		v2f o;
+		o.pos = UnityObjectToClipPos(v.vertex);
+		
+		o.uv[0] = float2(
+			dot(v.texcoord.xy, _UV_Transform.xy),
+			dot(v.texcoord.xy, _UV_Transform.zw)
+		);
+		
+		#if UNITY_UV_STARTS_AT_TOP
+		if(_MainTex_TexelSize.y<0.0)
+			o.uv[0].y = 1.0-o.uv[0].y;
+		#endif
+		
+		o.uv[1] =  v.texcoord.xy;	
+		return o;
+	}
+	
+	half4 fragAddSub (v2f i) : SV_Target {
+		half4 toAdd = tex2D(_Overlay, i.uv[0]) * _Intensity;
+		return tex2D(_MainTex, i.uv[1]) + toAdd;
+	}
+
+	half4 fragMultiply (v2f i) : SV_Target {
+		half4 toBlend = tex2D(_Overlay, i.uv[0]) * _Intensity;
+		return tex2D(_MainTex, i.uv[1]) * toBlend;
+	}	
+			
+	half4 fragScreen (v2f i) : SV_Target {
+		half4 toBlend =  (tex2D(_Overlay, i.uv[0]) * _Intensity);
+		return 1-(1-toBlend)*(1-(tex2D(_MainTex, i.uv[1])));
+	}
+
+	half4 fragOverlay (v2f i) : SV_Target {
+		half4 m = (tex2D(_Overlay, i.uv[0]));// * 255.0;
+		half4 color = (tex2D(_MainTex, i.uv[1]));//* 255.0;
+
+		// overlay blend mode
+		//color.rgb = (color.rgb/255.0) * (color.rgb + ((2*m.rgb)/( 255.0 )) * (255.0-color.rgb));
+		//color.rgb /= 255.0; 
+		 
+		/*
+if (Target > ½) R = 1 - (1-2x(Target-½)) x (1-Blend)
+if (Target <= ½) R = (2xTarget) x Blend		
+		*/
+		
+		float3 check = step(0.5, color.rgb);
+		float3 result = 0;
+		
+			result =  check * (half3(1,1,1) - ( (half3(1,1,1) - 2*(color.rgb-0.5)) *  (1-m.rgb))); 
+			result += (1-check) * (2*color.rgb) * m.rgb;
+		
+		return half4(lerp(color.rgb, result.rgb, (_Intensity)), color.a);
+	}
+	
+	half4 fragAlphaBlend (v2f i) : SV_Target {
+		half4 toAdd = tex2D(_Overlay, i.uv[0]) ;
+		return lerp(tex2D(_MainTex, i.uv[1]), toAdd, toAdd.a * _Intensity);
+	}	
+
+
+	ENDCG 
+	
+Subshader {
+	  ZTest Always Cull Off ZWrite Off
+      ColorMask RGB	  
+  		  	
+ Pass {    
+
+      CGPROGRAM
+      #pragma vertex vert
+      #pragma fragment fragAddSub
+      ENDCG
+  }
+
+ Pass {    
+
+      CGPROGRAM
+      #pragma vertex vert
+      #pragma fragment fragScreen
+      ENDCG
+  }
+
+ Pass {    
+
+      CGPROGRAM
+      #pragma vertex vert
+      #pragma fragment fragMultiply
+      ENDCG
+  }  
+
+ Pass {    
+
+      CGPROGRAM
+      #pragma vertex vert
+      #pragma fragment fragOverlay
+      ENDCG
+  }  
+  
+ Pass {    
+
+      CGPROGRAM
+      #pragma vertex vert
+      #pragma fragment fragAlphaBlend
+      ENDCG
+  }   
+}
+
+Fallback off
+	
+} // shader