diff --git a/cocos/3d/CCMesh.cpp b/cocos/3d/CCMesh.cpp
index f683caf684..7b10693999 100644
--- a/cocos/3d/CCMesh.cpp
+++ b/cocos/3d/CCMesh.cpp
@@ -43,6 +43,7 @@ Mesh::Mesh()
 , _visibleChanged(nullptr)
 , _glProgramState(nullptr)
 , _blend(BlendFunc::ALPHA_NON_PREMULTIPLIED)
+, _isTransparent(false)
 {
     
 }
diff --git a/cocos/3d/CCMesh.h b/cocos/3d/CCMesh.h
index c55f949460..b8c774a680 100644
--- a/cocos/3d/CCMesh.h
+++ b/cocos/3d/CCMesh.h
@@ -132,8 +132,8 @@ protected:
     Texture2D* _texture;  //texture that submesh is using
     MeshSkin*  _skin;     //skin
     bool       _visible; // is the submesh visible
+    bool       _isTransparent; // is this mesh transparent, it is a property of material in fact
     
-    //since 3.3
     std::string  _name;
     MeshIndexData*     _meshIndexData;
     GLProgramState* _glProgramState;