diff --git a/invesalius/constants.py b/invesalius/constants.py
index 3ab9755..bbd1de5 100644
--- a/invesalius/constants.py
+++ b/invesalius/constants.py
@@ -1,3 +1,4 @@
+import os.path
 from project import Project
 
 # Slice orientation
@@ -135,3 +136,5 @@ REDUCE_IMAGEDATA_QUALITY = 1
 
 # if 1, use vtkVolumeRaycastMapper, if 0, use vtkFixedPointVolumeRayCastMapper
 TYPE_RAYCASTING_MAPPER = 0
+
+RAYCASTING_PRESETS_DIRECTORY= os.path.join("..", "presets", "raycasting")
diff --git a/invesalius/control.py b/invesalius/control.py
index 7d8bc70..9fa66ea 100755
--- a/invesalius/control.py
+++ b/invesalius/control.py
@@ -7,7 +7,7 @@ import data.imagedata_utils as utils
 import data.surface as surface
 import data.volume as volume
 import reader.dicom_reader as dicom
-import reader.analyze_reader as analyze
+#import reader.analyze_reader as analyze
 
 DEFAULT_THRESH_MODE = 0
 
diff --git a/invesalius/data/volume.py b/invesalius/data/volume.py
index f998d0a..df2e50f 100755
--- a/invesalius/data/volume.py
+++ b/invesalius/data/volume.py
@@ -128,12 +128,10 @@ class Volume():
         ps.Publisher.sendMessage('Set colour interactor', colour)
 
     def __config_preset(self):
-        print ">>Config"
         if self.config['advancedCLUT']:
             self.Create16bColorTable(self.scale)
             self.CreateOpacityTable(self.scale)
         else:
-            print ">>>here"
             self.Create8bColorTable(self.scale)
             self.Create8bOpacityTable(self.scale)
 
@@ -195,11 +193,17 @@ class Volume():
         self.color_transfer = color_transfer
 
     def Create8bColorTable(self, scale):
-        color_transfer = vtk.vtkColorTransferFunction()
+        if self.color_transfer:
+            color_transfer = self.color_transfer
+        else:
+            color_transfer = vtk.vtkColorTransferFunction()
         color_transfer.RemoveAllPoints()
         color_preset = self.config['CLUT']
+        print ">>>", color_preset
         if color_preset != "No CLUT":
-            p = plistlib.readPlist(os.path.join('ColorList', color_preset + '.plist'))
+            p = plistlib.readPlist(
+                os.path.join(constants.RAYCASTING_PRESETS_DIRECTORY,
+                             'ColorList', color_preset + '.plist'))
             print "nome clut", p
             r = p['Red']
             g = p['Green']
@@ -211,6 +215,7 @@ class Volume():
             for i,rgb in enumerate(colors):
                 print i,inc, ww, wl - ww/2 + i * inc, rgb
                 color_transfer.AddRGBPoint((wl - ww/2) + (i * inc), *[i/255.0 for i in rgb])
+        self.color_transfer = color_transfer
         return color_transfer
 
     def CreateOpacityTable(self, scale):
@@ -248,7 +253,10 @@ class Volume():
         self.opacity_transfer_func = opacity_transfer_func
 
     def Create8bOpacityTable(self, scale):
-        opacity_transfer_func = vtk.vtkPiecewiseFunction()
+        if self.opacity_transfer_func:
+            opacity_transfer_func = self.opacity_transfer_func
+        else:
+            opacity_transfer_func = vtk.vtkPiecewiseFunction()
         opacity_transfer_func.RemoveAllPoints()
         opacities = []
 
@@ -271,6 +279,7 @@ class Volume():
         opacity_transfer_func.AddPoint(l1, 0)
         opacity_transfer_func.AddPoint(l2, 1)
 
+        self.opacity_transfer_func = opacity_transfer_func
         return opacity_transfer_func
 
     def CreateBackgroundColor(self):
--
libgit2 0.21.2