diff --git a/src/ThreadVisualisation.cpp b/src/ThreadVisualisation.cpp
index fff7e7cb196638ec0e48ae440a2f9e1e59f498b7..6af1af8bbbe626e02cec49b03889145856b7de30 100644
--- a/src/ThreadVisualisation.cpp
+++ b/src/ThreadVisualisation.cpp
@@ -534,8 +534,6 @@ void  ThreadVisualisation::initGlyphs2D()
     VTK_CREATE(vtkPolyDataMapper, mapper);
     mapper->SetInputConnection(extern_glyphs_pedestrians->GetOutputPort());
     //improve the performance
-    mapper->GlobalImmediateModeRenderingOn();
-
 
     VTK_CREATE(vtkLookupTable, lut);
     lut->SetHueRange(0.0,0.470);
@@ -637,7 +635,6 @@ void ThreadVisualisation::initGlyphs3D()
 
     VTK_CREATE(vtkPolyDataMapper, mapper);
     mapper->SetInputConnection(extern_glyphs_pedestrians_3D->GetOutputPort());
-    mapper->GlobalImmediateModeRenderingOn();
 
     VTK_CREATE(vtkLookupTable, lut);
     lut->SetHueRange(0.0,0.470);