Transparency by mask draft shader.

sources/Assets/Scripts/Shaders/Transparency.shader

@@ -0,0 +1,82 @@
+Shader "Custom/Transparency"
+{
+	Properties
+	{
+		[PerRendererData] _MainTex ("Sprite Texture", 2D) = "white" {}
+		_Color ("Tint", Color) = (1,1,1,1)
+		_AlphaTex("Alpha Texture", 2D) = "white" {}
+		_Amount("Amount", Range(0,1)) = 1.0
+		_Amount2("Amount2", Range(0,1)) = 1.0
+	}
+
+	SubShader
+	{
+		Tags
+		{ 
+			"Queue"="Transparent" 
+			//"Queue" = "Transparent+1"
+			"IgnoreProjector"="True" 
+			//"RenderType" = "Opaque"
+			"RenderType"="Transparent" 
+			"PreviewType"="Plane"
+			"CanUseSpriteAtlas"="True"
+		}
+
+		Cull Off
+		Lighting Off
+		ZWrite Off
+		Blend One OneMinusSrcAlpha
+
+		Pass
+		{
+		CGPROGRAM
+			#pragma vertex vert
+			#pragma fragment frag
+			#include "UnityCG.cginc"
+
+			struct appdata_t
+			{
+				float4 vertex   : POSITION;
+				float2 texcoord : TEXCOORD0;
+			};
+
+			struct v2f
+			{
+				float4 vertex   : SV_POSITION;
+				float2 texcoord  : TEXCOORD0;
+			};
+
+			v2f vert(appdata_t IN)
+			{
+				v2f OUT;
+				OUT.vertex = mul(UNITY_MATRIX_MVP, IN.vertex);
+				OUT.texcoord = IN.texcoord;
+				return OUT;
+			}
+
+			sampler2D _MainTex;			
+			sampler2D _AlphaTex;
+			float _Amount;
+			float _Amount2;
+
+			fixed4 frag(v2f IN) : SV_Target
+			{
+				fixed4 c = tex2D(_MainTex, IN.texcoord);
+				c.rgb *= c.a;
+
+				fixed4 t = tex2D(_AlphaTex, IN.texcoord);
+
+
+				if (t.a < _Amount)
+					return fixed4(0, 0, 0, 0);
+				else
+					return c;
+
+				//return lerp(c, c*t.a, _Amount);
+
+				//return lerp(c, c*pow(t.a, 1 / _Amount2), _Amount);
+			}
+		ENDCG
+		}
+	}
+}

sources/ProjectSettings/ProjectVersion.txt

@@ -1,2 +1,2 @@
-m_EditorVersion: 5.3.2f1
+m_EditorVersion: 5.3.4f1
 m_StandardAssetsVersion: 0