diff --git a/CMSceneGraph b/CMSceneGraph
index 3e2f129a..821bd3f4 160000
--- a/CMSceneGraph
+++ b/CMSceneGraph
@@ -1 +1 @@
-Subproject commit 3e2f129abf1b0480133010830b97f6eb902f960b
+Subproject commit 821bd3f4f056ad344a45c631aeb6c5d94579f0ee
diff --git a/inc/hgl/graph/mtl/UBOCommon.h b/inc/hgl/graph/mtl/UBOCommon.h
index 3c87a22d..70a63e83 100644
--- a/inc/hgl/graph/mtl/UBOCommon.h
+++ b/inc/hgl/graph/mtl/UBOCommon.h
@@ -33,6 +33,8 @@ constexpr const ShaderBufferSource SBS_CameraInfo=
     mat4 vp;
     mat4 inverse_vp;
 
+    vec4 frustum_planes[6];
+
     mat4 sky;
 
     vec3 pos;                   //eye
diff --git a/src/ShaderGen/common/MFCamera.h b/src/ShaderGen/common/MFCamera.h
index 8e7f3589..4318490a 100644
--- a/src/ShaderGen/common/MFCamera.h
+++ b/src/ShaderGen/common/MFCamera.h
@@ -26,6 +26,20 @@ vec3 GetViewUp(mat4 cv)
 {
     return vec3(cv[0][1],cv[1][1],cv[2][1]);
 }
+)";
+
+    constexpr const char *FrustumCheck=R"(
+bool FrustumCheck(vec4 pos, float radius)
+{
+    for (int i = 0; i < 6; i++) 
+    {
+        if (dot(pos, camera.frustum_planes[i]) + radius < 0.0)
+        {
+            return false;
+        }
+    }
+    return true;
+}
 )";
 }//namespace func
 STD_MTL_NAMESPACE_END