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diff --git a/org.simantics.g3d.vtk/src/org/simantics/g3d/vtk/utils/vtkPanelUtil.java b/org.simantics.g3d.vtk/src/org/simantics/g3d/vtk/utils/vtkPanelUtil.java
new file mode 100644
index 00000000..eb0e727e
--- /dev/null
+++ b/org.simantics.g3d.vtk/src/org/simantics/g3d/vtk/utils/vtkPanelUtil.java
@@ -0,0 +1,79 @@
+package org.simantics.g3d.vtk.utils;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.simantics.g3d.vtk.Activator;
+import org.simantics.g3d.vtk.preferences.CloseMethod;
+import org.simantics.g3d.vtk.preferences.PreferenceConstants;
+import org.simantics.utils.threads.AWTThread;
+
+import vtk.vtkCamera;
+import vtk.vtkObject;
+import vtk.vtkPanel;
+import vtk.vtkReferenceInformation;
+import vtk.vtkRenderWindow;
+import vtk.vtkRenderer;
+
+public class vtkPanelUtil {
+	
+	private static List<vtkPanel> activePanels = new ArrayList<vtkPanel>();
+	private static List<vtkPanel> waitingToDeletePanels = new ArrayList<vtkPanel>();
+	
+	public static void registerPanel(vtkPanel panel) {
+		activePanels.add(panel);
+	}
+	
+	public static void unregisterPanel(vtkPanel panel) {
+		assert (Thread.currentThread() == AWTThread.getThreadAccess().getThread());
+		if (!activePanels.remove(panel))
+			return;
+		CloseMethod method = getCloseMethod();
+		if (method == CloseMethod.ON_LAST_CLOSE) {
+			waitingToDeletePanels.add(panel);
+		
+			if (activePanels.size() == 0) {
+				cleanup();
+			}
+		} else if (method == CloseMethod.ON_CLOSE) {
+			dPanel(panel);
+			vtkGC();
+		} else if (method == CloseMethod.NO_CLOSE) {
+			waitingToDeletePanels.add(panel);			
+		}
+	}
+	
+	public static CloseMethod getCloseMethod() {
+		return CloseMethod.valueOf(Activator.getDefault().getPreferenceStore().getString(PreferenceConstants.CLOSE_METHOD));
+	}
+	
+	private static void cleanup() {
+		
+		for (vtkPanel p : waitingToDeletePanels) {
+			dPanel(p);
+		}
+		waitingToDeletePanels.clear();
+		vtkGC();
+	}
+	
+	private static void vtkGC() {
+		vtkReferenceInformation info = vtkObject.JAVA_OBJECT_MANAGER.gc(true);
+		System.out.println("Referenced objects when closing editor: " + info.getTotalNumberOfObjects() + "\n");
+		System.out.println(info.listRemovedReferenceToString());
+		System.out.println(info.listKeptReferenceToString());
+	}
+
+	
+	private static void dPanel(vtkPanel panel) {
+		panel.lock();
+		vtkCamera camera = panel.GetRenderer().GetActiveCamera();
+		vtkRenderer ren = panel.GetRenderer();
+		vtkRenderWindow win = panel.GetRenderWindow();
+		win.SetForceMakeCurrent();
+		panel.Delete();
+		panel = null;
+		camera.Delete();
+		ren.Delete();
+		win.Delete();
+	}
+}