init

Assets/Shaders/Level Background.shader

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+Shader "Geri/Level Background"
+{
+    Properties
+    {
+        [PerRendererData] _Color1 ("Color 1", Color) = (1,1,1,1)
+        [PerRendererData] _Color2 ("Color 2", Color) = (0,0,0,1)
+        [PerRendererData] _Opacity ("Opacity", Float) = 1
+    }
+
+    SubShader
+    {
+        Tags
+        {
+            "Queue"="Transparent"
+            "IgnoreProjector"="True"
+            "RenderType"="Transparent"
+            "PreviewType"="Plane"
+            "CanUseSpriteAtlas"="True"
+        }
+
+        Cull Off
+        Lighting Off
+        ZWrite Off
+
+        Blend SrcAlpha OneMinusSrcAlpha
+
+        Pass
+        {
+            Name "Default"
+        CGPROGRAM
+            #pragma vertex vert
+            #pragma fragment frag
+            #pragma target 2.0
+
+            #include "UnityCG.cginc"
+
+            #pragma multi_compile_local _ UNITY_UI_CLIP_RECT
+            #pragma multi_compile_local _ UNITY_UI_ALPHACLIP
+
+            struct appdata_t
+            {
+                float4 vertex   : POSITION;
+                float4 color    : COLOR;
+                float2 texcoord : TEXCOORD0;
+                UNITY_VERTEX_INPUT_INSTANCE_ID
+            };
+
+            struct v2f
+            {
+                float4 vertex   : SV_POSITION;
+                float2 texcoord  : TEXCOORD0;
+                UNITY_VERTEX_OUTPUT_STEREO
+            };
+
+            fixed4 _Color1;
+            fixed4 _Color2;
+            float _Opacity;
+
+            v2f vert(appdata_t v)
+            {
+                v2f OUT;
+                UNITY_SETUP_INSTANCE_ID(v);
+                UNITY_INITIALIZE_VERTEX_OUTPUT_STEREO(OUT);
+                OUT.vertex = v.vertex;
+                OUT.texcoord = v.texcoord;
+                return OUT;
+            }
+
+            fixed4 frag(v2f IN) : SV_Target
+            {
+                bool is_color_1 = int(floor(2 * (IN.texcoord.x + IN.texcoord.y))) % 2 == 0;
+                half4 color = _Color1 * is_color_1 + _Color2 * (1 - is_color_1);
+                color.a = _Opacity;
+
+                #ifdef UNITY_UI_ALPHACLIP
+                clip (color.a - 0.001);
+                #endif
+
+                return color;
+            }
+        ENDCG
+        }
+    }
+}