diff --git a/python/damask/_configmaterial.py b/python/damask/_configmaterial.py
index 2eba905a6..f83c12147 100644
--- a/python/damask/_configmaterial.py
+++ b/python/damask/_configmaterial.py
@@ -106,11 +106,8 @@ class ConfigMaterial(Config):
         Load DREAM.3D (HDF5) file.
 
         Data in DREAM.3D files can be stored per cell ('CellData')
-        and/or per grain ('Grain Data'). Per default, cell-wise data
-        is assumed.
-
-        damask.Grid.load_DREAM3D allows to get the corresponding geometry
-        for the grid solver.
+        and/or per grain ('Grain Data'). Per default, i.e. if
+        'grain_data' is None, cell-wise data is assumed.
 
         Parameters
         ----------
@@ -140,15 +137,22 @@ class ConfigMaterial(Config):
             and grain- or cell-wise data. Defaults to None, in which case
             it is set as the path that contains _SIMPL_GEOMETRY/SPACING.
 
-        Notes
-        -----
-        Homogenization and phase entries are emtpy and need to be defined separately.
-
         Returns
         -------
         loaded : damask.ConfigMaterial
             Material configuration from file.
 
+        Notes
+        -----
+        damask.Grid.load_DREAM3D gives the corresponding geometry for
+        the grid solver.
+
+        For cell-wise data, only unique combinations of
+        orientation and phase are considered.
+
+        Homogenization and phase entries are emtpy and need to be
+        defined separately.
+
         """
         b = util.DREAM3D_base_group(fname) if base_group is None else base_group
         c = util.DREAM3D_cell_data_group(fname) if cell_data is None else cell_data
diff --git a/python/damask/_grid.py b/python/damask/_grid.py
index a0571279c..01ad3ad6f 100644
--- a/python/damask/_grid.py
+++ b/python/damask/_grid.py
@@ -358,10 +358,10 @@ class Grid:
         """
         Load DREAM.3D (HDF5) file.
 
-        Data in DREAM.3D files can be stored per cell ('CellData') and/or
-        per grain ('Grain Data'). Per default, cell-wise data is assumed.
+        Data in DREAM.3D files can be stored per cell ('CellData')
+        and/or per grain ('Grain Data'). Per default, i.e. if
+        'feature_IDs' is None, cell-wise data is assumed.
 
-        damask.ConfigMaterial.load_DREAM3D gives the corresponding material definition.
 
         Parameters
         ----------
@@ -392,6 +392,14 @@ class Grid:
         loaded : damask.Grid
             Grid-based geometry from file.
 
+        Notes
+        -----
+        damask.ConfigMaterial.load_DREAM3D gives the corresponding
+        material definition.
+
+        For cell-wise data, only unique combinations of
+        orientation and phase are considered.
+
         """
         b = util.DREAM3D_base_group(fname)      if base_group is None else base_group
         c = util.DREAM3D_cell_data_group(fname) if cell_data  is None else cell_data