diff --git a/components/myguiplatform/myguirendermanager.cpp b/components/myguiplatform/myguirendermanager.cpp
index e2f2f9820..bf1d66fe8 100644
--- a/components/myguiplatform/myguirendermanager.cpp
+++ b/components/myguiplatform/myguirendermanager.cpp
@@ -195,7 +195,9 @@ public:
     META_Object(osgMyGUI, Drawable)
 
 private:
+    // double buffering approach, to avoid the need for synchronization with the draw thread
     std::vector<Batch> mBatchVector[2];
+
     int mWriteTo;
     mutable int mReadFrom;
 };