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Assets/Oculus/VR/Shaders/OVRVirtualKeyboard/VirtualKeyboardMMBias.shader

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+Shader "Oculus/VirtualKeyboard/OVRVirtualKeyboardMMBias"
+{
+    Properties
+    {
+        [PerRendererData]  _MainTex ("Sprite Texture", 2D) = "white" {}
+        _Color ("Tint", Color) = (1.000000,1.000000,1.000000,1.000000)
+        [HideInInspector]  _RendererColor ("RendererColor", Color) = (1.000000,1.000000,1.000000,1.000000)
+        _MainTexMMBias("Mipmap Bias", Float) = 0.000000
+    }
+    SubShader
+    {
+        Tags { "QUEUE"="Transparent" "IGNOREPROJECTOR"="true" "RenderType"="Transparent" "CanUseSpriteAtlas"="true" "PreviewType"="Plane" }
+        LOD 100
+
+        Pass
+        {
+            Tags { "QUEUE"="Transparent" "IGNOREPROJECTOR"="true" "RenderType"="Transparent" "CanUseSpriteAtlas"="true" "PreviewType"="Plane" }
+
+            ZWrite Off
+            Cull Off
+            Blend One OneMinusSrcAlpha
+
+            CGPROGRAM
+            #pragma vertex vert
+            #pragma fragment frag
+
+            #include "UnityCG.cginc"
+
+            struct appdata
+            {
+                float4 vertex : POSITION;
+                float4 color : COLOR0;
+                float2 uv : TEXCOORD0;
+            };
+
+            struct v2f
+            {
+                float4 color : COLOR0;
+                float2 uv : TEXCOORD0;
+                float4 vertex : SV_POSITION;
+            };
+
+            sampler2D _MainTex;
+            float4 _MainTex_ST;
+            float4 _Color;
+            float4 _RendererColor;
+            half _MainTexMMBias;
+
+            // Perform multiple samples per fragment to reduce aliasing
+            // Source: https://developer.oculus.com/blog/common-rendering-mistakes-how-to-find-them-and-how-to-fix-them/
+            fixed4 tex2DmultisampleBias(sampler2D tex, float2 uv, half bias)
+            {
+              float2 dx = ddx(uv) * 0.25;
+              float2 dy = ddy(uv) * 0.25;
+
+              float4 sample0 = tex2Dbias(tex, half4(uv + dx + dy, 0.0, bias));
+              float4 sample1 = tex2Dbias(tex, half4(uv + dx - dy, 0.0, bias));
+              float4 sample2 = tex2Dbias(tex, half4(uv - dx + dy, 0.0, bias));
+              float4 sample3 = tex2Dbias(tex, half4(uv - dx - dy, 0.0, bias));
+
+              return (sample0 + sample1 + sample2 + sample3) * 0.25;
+            }
+
+            v2f vert (appdata v)
+            {
+                v2f o;
+                o.vertex = UnityObjectToClipPos(v.vertex);
+                o.color = v.color * _Color * _RendererColor;
+                o.uv = TRANSFORM_TEX(v.uv, _MainTex);
+                return o;
+            }
+
+            fixed4 frag(v2f i) : SV_Target
+            {
+                fixed4 col = tex2DmultisampleBias(_MainTex, i.uv, _MainTexMMBias) * i.color;
+                return col;
+            }
+            ENDCG
+        }
+    }
+}

Assets/Oculus/VR/Shaders/OVRVirtualKeyboard/VirtualKeyboardMMBias.shader.meta

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+fileFormatVersion: 2
+guid: 502519190e12db54c8dd6a9322721a70
+ShaderImporter:
+  externalObjects: {}
+  defaultTextures: []
+  nonModifiableTextures: []
+  preprocessorOverride: 0
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: