diff --git a/common/gal/opengl/vertex_manager.cpp b/common/gal/opengl/vertex_manager.cpp
index 4f65608ff9..c9e7c5a655 100644
--- a/common/gal/opengl/vertex_manager.cpp
+++ b/common/gal/opengl/vertex_manager.cpp
@@ -49,7 +49,7 @@ VERTEX_MANAGER::VERTEX_MANAGER( bool aCached ) :
 }
 
 
-void VERTEX_MANAGER::Reserve( unsigned int aSize )
+bool VERTEX_MANAGER::Reserve( unsigned int aSize )
 {
     assert( m_reservedSpace == 0 && m_reserved == NULL );
 
@@ -66,14 +66,16 @@ void VERTEX_MANAGER::Reserve( unsigned int aSize )
             show_err = false;
         }
 
-        return;
+        return false;
     }
 
     m_reservedSpace = aSize;
+
+    return true;
 }
 
 
-void VERTEX_MANAGER::Vertex( GLfloat aX, GLfloat aY, GLfloat aZ )
+bool VERTEX_MANAGER::Vertex( GLfloat aX, GLfloat aY, GLfloat aZ )
 {
     // flag to avoid hanging by calling DisplayError too many times:
     static bool show_err = true;
@@ -102,14 +104,16 @@ void VERTEX_MANAGER::Vertex( GLfloat aX, GLfloat aY, GLfloat aZ )
             show_err = false;
         }
 
-        return;
+        return false;
     }
 
     putVertex( *newVertex, aX, aY, aZ );
+
+    return true;
 }
 
 
-void VERTEX_MANAGER::Vertices( const VERTEX aVertices[], unsigned int aSize )
+bool VERTEX_MANAGER::Vertices( const VERTEX aVertices[], unsigned int aSize )
 {
     // flag to avoid hanging by calling DisplayError too many times:
     static bool show_err = true;
@@ -125,7 +129,7 @@ void VERTEX_MANAGER::Vertices( const VERTEX aVertices[], unsigned int aSize )
             show_err = false;
         }
 
-        return;
+        return false;
     }
 
     // Put vertices in already allocated memory chunk
@@ -133,6 +137,8 @@ void VERTEX_MANAGER::Vertices( const VERTEX aVertices[], unsigned int aSize )
     {
         putVertex( newVertex[i], aVertices[i].x, aVertices[i].y, aVertices[i].z );
     }
+
+    return true;
 }
 
 
diff --git a/include/gal/opengl/vertex_manager.h b/include/gal/opengl/vertex_manager.h
index c7455aecea..8bc89655e7 100644
--- a/include/gal/opengl/vertex_manager.h
+++ b/include/gal/opengl/vertex_manager.h
@@ -63,8 +63,9 @@ public:
      * allocates space for vertices, so it will be used with subsequent Vertex() calls.
      *
      * @param aSize is the number of vertices that should be available in the reserved space.
+     * @return True if successful, false otherwise.
      */
-    void Reserve( unsigned int aSize );
+    bool Reserve( unsigned int aSize );
 
     /**
      * Function Vertex()
@@ -74,10 +75,11 @@ public:
      * matrix applied.
      *
      * @param aVertex contains vertex coordinates.
+     * @return True if successful, false otherwise.
      */
-    inline void Vertex( const VERTEX& aVertex )
+    inline bool Vertex( const VERTEX& aVertex )
     {
-        Vertex( aVertex.x, aVertex.y, aVertex.z );
+        return Vertex( aVertex.x, aVertex.y, aVertex.z );
     }
 
     /**
@@ -88,8 +90,9 @@ public:
      * @param aX is the X coordinate of the new vertex.
      * @param aY is the Y coordinate of the new vertex.
      * @param aZ is the Z coordinate of the new vertex.
+     * @return True if successful, false otherwise.
      */
-    void Vertex( GLfloat aX, GLfloat aY, GLfloat aZ );
+    bool Vertex( GLfloat aX, GLfloat aY, GLfloat aZ );
 
     /**
      * Function Vertices()
@@ -101,8 +104,9 @@ public:
      *
      * @param aVertices contains vertices to be added
      * @param aSize is the number of vertices to be added.
+     * @return True if successful, false otherwise.
      */
-    void Vertices( const VERTEX aVertices[], unsigned int aSize );
+    bool Vertices( const VERTEX aVertices[], unsigned int aSize );
 
     /**
      * Function Color()