diff --git a/Assets/VRMShaders/VRM10/MToon10/Resources/VRM10/vrmc_materials_mtoon_define.hlsl b/Assets/VRMShaders/VRM10/MToon10/Resources/VRM10/vrmc_materials_mtoon_define.hlsl
index 04845a980..56fa66bfd 100644
--- a/Assets/VRMShaders/VRM10/MToon10/Resources/VRM10/vrmc_materials_mtoon_define.hlsl
+++ b/Assets/VRMShaders/VRM10/MToon10/Resources/VRM10/vrmc_materials_mtoon_define.hlsl
@@ -5,7 +5,7 @@
 static const float PI_2 = 6.28318530718;
 static const float EPS_COL = 0.00001;
 
-inline half3 mtoon_linearstep(half3 start, half3 end, half t)
+inline half3 mtoon_linearstep(const half3 start, const half3 end, const half t)
 {
     return min(max((t - start) / (end - start), 0.0), 1.0);
 }
@@ -15,7 +15,7 @@ inline bool MToon_IsPerspective()
     return unity_OrthoParams.w != 1.0;
 }
 
-inline float3 MToon_GetWorldSpaceNormalizedViewDir(float3 positionWS)
+inline float3 MToon_GetWorldSpaceNormalizedViewDir(const float3 positionWS)
 {
     if (MToon_IsPerspective())
     {
@@ -27,7 +27,7 @@ inline float3 MToon_GetWorldSpaceNormalizedViewDir(float3 positionWS)
     }
 }
 
-inline half3x3 MToon_GetTangentToWorld(half3 normalWS, half4 tangentWS)
+inline half3x3 MToon_GetTangentToWorld(const half3 normalWS, const half4 tangentWS)
 {
     const half3 normalizedNormalWS = normalize(normalWS);
     const half3 normalizedTangentWS = normalize(tangentWS.xyz);
@@ -37,6 +37,7 @@ inline half3x3 MToon_GetTangentToWorld(half3 normalWS, half4 tangentWS)
     return half3x3(normalizedTangentWS, normalizedBitangentWS, normalizedNormalWS);
 }
 
+// Compile-time constant
 inline bool MToon_IsForwardBasePass()
 {
 #if defined(UNITY_PASS_FORWARDBASE)
@@ -44,7 +45,17 @@ inline bool MToon_IsForwardBasePass()
 #elif defined(UNITY_PASS_FORWARDADD)
     return false;
 #else
-    // ????
+    // unexpected
+    return false;
+#endif
+}
+
+// Compile-time constant
+inline bool MToon_IsUvAnimationOn()
+{
+#if defined(_UVANIMATION)
+    return true;
+#else
     return false;
 #endif
 }
diff --git a/Assets/VRMShaders/VRM10/MToon10/Resources/VRM10/vrmc_materials_mtoon_forward_fragment.hlsl b/Assets/VRMShaders/VRM10/MToon10/Resources/VRM10/vrmc_materials_mtoon_forward_fragment.hlsl
index 8bedbb8ed..57b3a88bb 100644
--- a/Assets/VRMShaders/VRM10/MToon10/Resources/VRM10/vrmc_materials_mtoon_forward_fragment.hlsl
+++ b/Assets/VRMShaders/VRM10/MToon10/Resources/VRM10/vrmc_materials_mtoon_forward_fragment.hlsl
@@ -11,7 +11,7 @@
 #include "./vrmc_materials_mtoon_uv.hlsl"
 #include "./vrmc_materials_mtoon_unity_lighting.hlsl"
 
-half4 MToonFragment(Varyings input) : SV_Target
+half4 MToonFragment(const Varyings input) : SV_Target
 {
     // Get MToon UV (with UVAnimation)
     const float2 uv = GetMToonUv(input.uv);
@@ -44,13 +44,13 @@ half4 MToonFragment(Varyings input) : SV_Target
     const UnityLighting unityLighting = GetUnityLighting(input, normalWS);
 
     // Get MToon Lighting
-    MToonInput lightingInput;
-    lightingInput.uv = uv;
-    lightingInput.normalWS = normalWS;
-    lightingInput.viewDirWS = input.viewDirWS;
-    lightingInput.litColor = litColor.rgb;
-    lightingInput.alpha = alpha;
-    const half4 col = GetMToonLighting(unityLighting, lightingInput);
+    MToonInput mtoonInput;
+    mtoonInput.uv = uv;
+    mtoonInput.normalWS = normalWS;
+    mtoonInput.viewDirWS = input.viewDirWS;
+    mtoonInput.litColor = litColor.rgb;
+    mtoonInput.alpha = alpha;
+    const half4 col = GetMToonLighting(unityLighting, mtoonInput);
 
     UNITY_APPLY_FOG(i.fogCoord, col);
 
diff --git a/Assets/VRMShaders/VRM10/MToon10/Resources/VRM10/vrmc_materials_mtoon_forward_vertex.hlsl b/Assets/VRMShaders/VRM10/MToon10/Resources/VRM10/vrmc_materials_mtoon_forward_vertex.hlsl
index d4603c81b..2d5c650da 100644
--- a/Assets/VRMShaders/VRM10/MToon10/Resources/VRM10/vrmc_materials_mtoon_forward_vertex.hlsl
+++ b/Assets/VRMShaders/VRM10/MToon10/Resources/VRM10/vrmc_materials_mtoon_forward_vertex.hlsl
@@ -8,7 +8,7 @@
 #include "./vrmc_materials_mtoon_input.hlsl"
 #include "./vrmc_materials_mtoon_attribute.hlsl"
 
-Varyings MToonVertex(Attributes v) // v is UnityCG macro specified name.
+Varyings MToonVertex(const Attributes v) // v is UnityCG macro specified name.
 {
     Varyings output = (Varyings)0;
 
diff --git a/Assets/VRMShaders/VRM10/MToon10/Resources/VRM10/vrmc_materials_mtoon_lighting.hlsl b/Assets/VRMShaders/VRM10/MToon10/Resources/VRM10/vrmc_materials_mtoon_lighting.hlsl
index 904151711..a637bf2bd 100644
--- a/Assets/VRMShaders/VRM10/MToon10/Resources/VRM10/vrmc_materials_mtoon_lighting.hlsl
+++ b/Assets/VRMShaders/VRM10/MToon10/Resources/VRM10/vrmc_materials_mtoon_lighting.hlsl
@@ -14,7 +14,7 @@ struct MToonInput
     half alpha;
 };
 
-inline half GetMToonLighting_Reflectance(UnityLighting lighting, MToonInput input)
+inline half GetMToonLighting_Reflectance(const UnityLighting lighting, const MToonInput input)
 {
     const half dotNL = dot(input.normalWS, lighting.directLightDirection);
     const half shadingInput = lerp(-1, 1, mtoon_linearstep(-1, 1, dotNL) * lighting.directLightAttenuation);
@@ -23,7 +23,7 @@ inline half GetMToonLighting_Reflectance(UnityLighting lighting, MToonInput inpu
     return mtoon_linearstep(-1.0 + shadingToony, +1.0 - shadingToony, shadingInput + shadingShift);
 }
 
-inline half3 GetMToonLighting_BasicLighting(UnityLighting unityLight, MToonInput input, half reflectance)
+inline half3 GetMToonLighting_BasicLighting(const UnityLighting unityLight, const MToonInput input, const half reflectance)
 {
     if (MToon_IsForwardBasePass())
     {
@@ -43,7 +43,7 @@ inline half3 GetMToonLighting_BasicLighting(UnityLighting unityLight, MToonInput
     }
 }
 
-inline half3 GetMToonLighting_Emissive(MToonInput input)
+inline half3 GetMToonLighting_Emissive(const MToonInput input)
 {
     if (MToon_IsForwardBasePass())
     {
@@ -55,7 +55,7 @@ inline half3 GetMToonLighting_Emissive(MToonInput input)
     }
 }
 
-inline half3 GetMToonLighting_Rim(MToonInput input, half3 lighting)
+inline half3 GetMToonLighting_Rim(const MToonInput input, const half3 lighting)
 {
     if (MToon_IsForwardBasePass())
     {
@@ -73,7 +73,7 @@ inline half3 GetMToonLighting_Rim(MToonInput input, half3 lighting)
     }
 }
 
-half4 GetMToonLighting(UnityLighting unityLight, MToonInput input)
+half4 GetMToonLighting(const UnityLighting unityLight, const MToonInput input)
 {
     const half reflectance = GetMToonLighting_Reflectance(unityLight, input);
 
diff --git a/Assets/VRMShaders/VRM10/MToon10/Resources/VRM10/vrmc_materials_mtoon_unity_lighting.hlsl b/Assets/VRMShaders/VRM10/MToon10/Resources/VRM10/vrmc_materials_mtoon_unity_lighting.hlsl
index 363dbef2b..e1764d6af 100644
--- a/Assets/VRMShaders/VRM10/MToon10/Resources/VRM10/vrmc_materials_mtoon_unity_lighting.hlsl
+++ b/Assets/VRMShaders/VRM10/MToon10/Resources/VRM10/vrmc_materials_mtoon_unity_lighting.hlsl
@@ -16,30 +16,33 @@ struct UnityLighting
     half3 directLightAttenuation;
 };
 
-UnityLighting GetUnityLighting(Varyings input, half3 normalWS)
+UnityLighting GetUnityLighting(const Varyings input, const half3 normalWS)
 {
     UNITY_LIGHT_ATTENUATION(atten, input, input.positionWS);
 
     const half3 lightDir = normalize(UnityWorldSpaceLightDir(input.positionWS));
     const half3 lightColor = _LightColor0.rgb;
 
-    UnityLighting output = (UnityLighting) 0;
-
-#if defined(UNITY_PASS_FORWARDBASE)
-    output.indirectLight = ShadeSH9(half4(normalWS, 1));
-    output.indirectLightEqualized = (ShadeSH9(half4(0, 1, 0, 1)) + ShadeSH9(half4(0, -1, 0, 1))) * 0.5;
-    output.directLightColor = lightColor;
-    output.directLightDirection = lightDir;
-    output.directLightAttenuation = atten;
-#elif defined(UNITY_PASS_FORWARDADD)
-    output.indirectLight = 0;
-    output.indirectLightEqualized = 0;
-    output.directLightColor = lightColor;
-    output.directLightDirection = lightDir;
-    output.directLightAttenuation = atten;
-#endif
-
-    return output;
+    if (MToon_IsForwardBasePass())
+    {
+        UnityLighting output;
+        output.indirectLight = ShadeSH9(half4(normalWS, 1));
+        output.indirectLightEqualized = (ShadeSH9(half4(0, 1, 0, 1)) + ShadeSH9(half4(0, -1, 0, 1))) * 0.5;
+        output.directLightColor = lightColor;
+        output.directLightDirection = lightDir;
+        output.directLightAttenuation = atten;
+        return output;
+    }
+    else
+    {
+        UnityLighting output;
+        output.indirectLight = 0;
+        output.indirectLightEqualized = 0;
+        output.directLightColor = lightColor;
+        output.directLightDirection = lightDir;
+        output.directLightAttenuation = atten;
+        return output;
+    }
 }
 
 #endif
diff --git a/Assets/VRMShaders/VRM10/MToon10/Resources/VRM10/vrmc_materials_mtoon_uv.hlsl b/Assets/VRMShaders/VRM10/MToon10/Resources/VRM10/vrmc_materials_mtoon_uv.hlsl
index 546ef7faf..6c92d4139 100644
--- a/Assets/VRMShaders/VRM10/MToon10/Resources/VRM10/vrmc_materials_mtoon_uv.hlsl
+++ b/Assets/VRMShaders/VRM10/MToon10/Resources/VRM10/vrmc_materials_mtoon_uv.hlsl
@@ -5,22 +5,23 @@
 #include "./vrmc_materials_mtoon_define.hlsl"
 #include "./vrmc_materials_mtoon_input.hlsl"
 
-float2 GetMToonUv(float2 geometryUv)
+float2 GetMToonUv(const float2 geometryUv)
 {
     // get raw uv with _MainTex_ST
     const float2 uvRaw = TRANSFORM_TEX(geometryUv, _MainTex);
 
-#if defined(_UVANIMATION)
-    const float uvAnimationCoef = UNITY_SAMPLE_TEX2D(_UvAnimMaskTex, uvRaw).b * _Time.y;
-    const float2 uvAnimationAdd = uvAnimationCoef * float2(_UvAnimScrollXSpeed, _UvAnimScrollYSpeed);
-    const float rotateRad = uvAnimationCoef * _UvAnimRotationSpeed * PI_2;
-    const float2 rotatePivot = float2(0.5, 0.5);
-    const float2 uv = mul(float2x2(cos(rotateRad), -sin(rotateRad), sin(rotateRad), cos(rotateRad)), uvRaw + uvAnimationAdd - rotatePivot) + rotatePivot;
-#else
-    const float2 uv = uvRaw;
-#endif
-
-    return uv;
+    if (MToon_IsUvAnimationOn())
+    {
+        const float uvAnimationCoef = UNITY_SAMPLE_TEX2D(_UvAnimMaskTex, uvRaw).b * _Time.y;
+        const float2 uvAnimationAdd = uvAnimationCoef * float2(_UvAnimScrollXSpeed, _UvAnimScrollYSpeed);
+        const float rotateRad = uvAnimationCoef * _UvAnimRotationSpeed * PI_2;
+        const float2 rotatePivot = float2(0.5, 0.5);
+        return mul(float2x2(cos(rotateRad), -sin(rotateRad), sin(rotateRad), cos(rotateRad)), uvRaw + uvAnimationAdd - rotatePivot) + rotatePivot;
+    }
+    else
+    {
+        return uvRaw;
+    }
 }
 
 #endif