diff --git a/Packages/vcs/Lib/VTKPlots.py b/Packages/vcs/Lib/VTKPlots.py
index 4634025050..3e6db361f4 100644
--- a/Packages/vcs/Lib/VTKPlots.py
+++ b/Packages/vcs/Lib/VTKPlots.py
@@ -1153,7 +1153,7 @@ def plot2D(self,data1,data2,tmpl,gm,vtk_backend_grid=None,vtk_backend_geo=None):
       else:
         lmx= levs[-1]
       mapper.SetScalarRange(lmn,lmx)
-      returned["vtk_backend_luts"]=[[lut,[lmn,lmx,False]],]
+      returned["vtk_backend_luts"]=[[lut,[lmn,lmx,True]],]
 
     if missingMapper is not None:
       if isinstance(gm,meshfill.Gfm):