diff --git a/Assets/Klak/Hap/Resources/Hap1.shader b/Assets/Klak/Hap/Resources/Hap1.shader
index 1314a33..a0bebd5 100644
--- a/Assets/Klak/Hap/Resources/Hap1.shader
+++ b/Assets/Klak/Hap/Resources/Hap1.shader
@@ -9,25 +9,35 @@ Shader "Klak/HAP"
 
     #include "UnityCG.cginc"
 
+    struct Attributes
+    {
+        float4 position : POSITION;
+        float2 texcoord : TEXCOORD;
+        UNITY_VERTEX_INPUT_INSTANCE_ID
+    };
+
+    struct Varyings
+    {
+        float4 position : SV_Position;
+        float2 texcoord : TEXCOORD;
+    };
+
     sampler2D _MainTex;
     float4 _MainTex_ST;
 
-    float4 Vertex(
-        float4 position : POSITION,
-        inout float2 texcoord : TEXCOORD
-    ) : SV_Position
+    Varyings Vertex(Attributes input)
     {
-        texcoord = TRANSFORM_TEX(texcoord, _MainTex);
-        texcoord.y = 1 - texcoord.y;
-        return UnityObjectToClipPos(position);
+        UNITY_SETUP_INSTANCE_ID(input);
+        Varyings output;
+        output.position = UnityObjectToClipPos(input.position);
+        output.texcoord = TRANSFORM_TEX(input.texcoord, _MainTex);
+        output.texcoord.y = 1 - output.texcoord.y;
+        return output;
     }
 
-    fixed4 Fragment(
-        float4 position : POSITION,
-        float2 texcoord : TEXCOORD
-    ) : SV_Target
+    fixed4 Fragment(Varyings input) : SV_Target
     {
-        return tex2D(_MainTex, texcoord);
+        return tex2D(_MainTex, input.texcoord);
     }
 
     ENDCG
@@ -40,6 +50,7 @@ Shader "Klak/HAP"
             CGPROGRAM
             #pragma vertex Vertex
             #pragma fragment Fragment
+            #pragma multi_compile_instancing
             ENDCG
         }
     }
diff --git a/Assets/Klak/Hap/Resources/Hap5.shader b/Assets/Klak/Hap/Resources/Hap5.shader
index ae74dbf..18f42cf 100644
--- a/Assets/Klak/Hap/Resources/Hap5.shader
+++ b/Assets/Klak/Hap/Resources/Hap5.shader
@@ -9,25 +9,35 @@ Shader "Klak/HAP Alpha"
 
     #include "UnityCG.cginc"
 
+    struct Attributes
+    {
+        float4 position : POSITION;
+        float2 texcoord : TEXCOORD;
+        UNITY_VERTEX_INPUT_INSTANCE_ID
+    };
+
+    struct Varyings
+    {
+        float4 position : SV_Position;
+        float2 texcoord : TEXCOORD;
+    };
+
     sampler2D _MainTex;
     float4 _MainTex_ST;
 
-    float4 Vertex(
-        float4 position : POSITION,
-        inout float2 texcoord : TEXCOORD
-    ) : SV_Position
+    Varyings Vertex(Attributes input)
     {
-        texcoord = TRANSFORM_TEX(texcoord, _MainTex);
-        texcoord.y = 1 - texcoord.y;
-        return UnityObjectToClipPos(position);
+        UNITY_SETUP_INSTANCE_ID(input);
+        Varyings output;
+        output.position = UnityObjectToClipPos(input.position);
+        output.texcoord = TRANSFORM_TEX(input.texcoord, _MainTex);
+        output.texcoord.y = 1 - output.texcoord.y;
+        return output;
     }
 
-    fixed4 Fragment(
-        float4 position : POSITION,
-        float2 texcoord : TEXCOORD
-    ) : SV_Target
+    fixed4 Fragment(Varyings input) : SV_Target
     {
-        return tex2D(_MainTex, texcoord);
+        return tex2D(_MainTex, input.texcoord);
     }
 
     ENDCG
@@ -42,6 +52,7 @@ Shader "Klak/HAP Alpha"
             CGPROGRAM
             #pragma vertex Vertex
             #pragma fragment Fragment
+            #pragma multi_compile_instancing
             ENDCG
         }
     }
diff --git a/Assets/Klak/Hap/Resources/HapY.shader b/Assets/Klak/Hap/Resources/HapY.shader
index 4007e0c..4cfb311 100644
--- a/Assets/Klak/Hap/Resources/HapY.shader
+++ b/Assets/Klak/Hap/Resources/HapY.shader
@@ -9,6 +9,19 @@ Shader "Klak/HAP Q"
 
     #include "UnityCG.cginc"
 
+    struct Attributes
+    {
+        float4 position : POSITION;
+        float2 texcoord : TEXCOORD;
+        UNITY_VERTEX_INPUT_INSTANCE_ID
+    };
+
+    struct Varyings
+    {
+        float4 position : SV_Position;
+        float2 texcoord : TEXCOORD;
+    };
+
     sampler2D _MainTex;
     float4 _MainTex_ST;
 
@@ -26,22 +39,19 @@ Shader "Klak/HAP Q"
         return rgb;
     }
 
-    float4 Vertex(
-        float4 position : POSITION,
-        inout float2 texcoord : TEXCOORD
-    ) : SV_Position
+    Varyings Vertex(Attributes input)
     {
-        texcoord = TRANSFORM_TEX(texcoord, _MainTex);
-        texcoord.y = 1 - texcoord.y;
-        return UnityObjectToClipPos(position);
+        UNITY_SETUP_INSTANCE_ID(input);
+        Varyings output;
+        output.position = UnityObjectToClipPos(input.position);
+        output.texcoord = TRANSFORM_TEX(input.texcoord, _MainTex);
+        output.texcoord.y = 1 - output.texcoord.y;
+        return output;
     }
 
-    fixed4 Fragment(
-        float4 position : POSITION,
-        float2 texcoord : TEXCOORD
-    ) : SV_Target
+    fixed4 Fragment(Varyings input) : SV_Target
     {
-        return fixed4(CoCgSY2RGB(tex2D(_MainTex, texcoord)), 1);
+        return fixed4(CoCgSY2RGB(tex2D(_MainTex, input.texcoord)), 1);
     }
 
     ENDCG
@@ -55,6 +65,7 @@ Shader "Klak/HAP Q"
             #pragma multi_compile _ UNITY_COLORSPACE_GAMMA
             #pragma vertex Vertex
             #pragma fragment Fragment
+            #pragma multi_compile_instancing
             ENDCG
         }
     }