diff --git a/invesalius/constants.py b/invesalius/constants.py
index 9e331f982..45694d9ba 100644
--- a/invesalius/constants.py
+++ b/invesalius/constants.py
@@ -1016,7 +1016,7 @@
     "threshold_down": 0,
     "range_up": 1,
     "mep_colormap": "Viridis",
-    "gaussian_sharpness": 0.4,
+    "gaussian_sharpness": 1.0,
     "gaussian_radius": 3,
     "dimensions_size": 80,
     "colormap_range_uv": {"min": 50, "low": 200, "mid": 600, "max": 1000},
diff --git a/invesalius/data/visualization/mep_visualizer.py b/invesalius/data/visualization/mep_visualizer.py
index 693d8aab4..fad5abcfe 100644
--- a/invesalius/data/visualization/mep_visualizer.py
+++ b/invesalius/data/visualization/mep_visualizer.py
@@ -310,11 +310,12 @@ def UpdateMEPPoints(self):
             markers (List[Marker]): The list of marker objects to add/update points for.
             clear_old (bool, default=False): If True, clears all existing points before updating.
         """
+        if not self._config_params["mep_enabled"]:
+            return
         if not self.surface:
             return
 
         markers, skip = self._FilterMarkers(MarkersControl().list)
-
         if not markers:
             self.points = vtkPolyData()
             self.UpdateVisualization()
diff --git a/invesalius/gui/dialogs.py b/invesalius/gui/dialogs.py
index 59f218cf2..113650f79 100644
--- a/invesalius/gui/dialogs.py
+++ b/invesalius/gui/dialogs.py
@@ -1221,11 +1221,11 @@ def ShowEnterMEPValue(default):
     if result is None:
         msg = _("The value entered is not a number.")
         if sys.platform == "darwin":
-            dlg = wx.MessageDialog(None, "", msg, wx.OK)
+            dlg_warn = wx.MessageDialog(None, "", msg, wx.OK)
         else:
-            dlg = wx.MessageDialog(None, msg, "InVesalius 3", wx.OK)
-        dlg.ShowModal()
-        dlg.Destroy()
+            dlg_warn = wx.MessageDialog(None, msg, "InVesalius 3", wx.OK)
+        dlg_warn.ShowModal()
+        dlg_warn.Destroy()
 
     dlg.Destroy()
 
diff --git a/invesalius/gui/task_navigator.py b/invesalius/gui/task_navigator.py
index a222616c6..8b9e37bbf 100644
--- a/invesalius/gui/task_navigator.py
+++ b/invesalius/gui/task_navigator.py
@@ -2274,7 +2274,6 @@ def _DeleteMultiple(self, markers):
             self.marker_list_ctrl.SetItem(n, const.ID_COLUMN, str(m_id - reduction_in_m_id))
 
         self.marker_list_ctrl.Show()
-        Publisher.sendMessage("Redraw MEP mapping")
 
     def _SetPointOfInterest(self, marker):
         idx = self.__find_marker_index(marker.marker_id)
@@ -3152,7 +3151,6 @@ def GetMarkersFromFile(self, filename, overwrite_image_fiducials):
             utils.debug(e)
 
         self.marker_list_ctrl.Show()
-        Publisher.sendMessage("Redraw MEP mapping")
         Publisher.sendMessage("Render volume viewer")
         Publisher.sendMessage("Update UI for refine tab")
         self.markers.SaveState()