diff --git a/python/tests/reference/ConfigMaterial/2phase_irregularGrid.dream3d b/python/tests/reference/ConfigMaterial/2phase_irregularGrid.dream3d
new file mode 120000
index 000000000..94f337206
--- /dev/null
+++ b/python/tests/reference/ConfigMaterial/2phase_irregularGrid.dream3d
@@ -0,0 +1 @@
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\ No newline at end of file
diff --git a/python/tests/reference/ConfigMaterial/2phase_irregularGrid.json b/python/tests/reference/ConfigMaterial/2phase_irregularGrid.json
new file mode 120000
index 000000000..66071ae27
--- /dev/null
+++ b/python/tests/reference/ConfigMaterial/2phase_irregularGrid.json
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\ No newline at end of file
diff --git a/python/tests/reference/ConfigMaterial/2phase_irregularGrid.xdmf b/python/tests/reference/ConfigMaterial/2phase_irregularGrid.xdmf
new file mode 120000
index 000000000..3736e65db
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\ No newline at end of file
diff --git a/python/tests/reference/Grid/2phase_irregularGrid.dream3d b/python/tests/reference/Grid/2phase_irregularGrid.dream3d
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+            "Data Container Name": "SyntheticVolumeDataContainer"
+        },
+        "NumFeaturesArrayPath": {
+            "Attribute Matrix Name": "CellEnsembleData",
+            "Data Array Name": "NumFeatures",
+            "Data Container Name": "SyntheticVolumeDataContainer"
+        },
+        "PeriodicBoundaries": 0,
+        "PrecipInputFile": "C:/Users/work",
+        "SaveGeometricDescriptions": 0,
+        "SelectedAttributeMatrixPath": {
+            "Attribute Matrix Name": "",
+            "Data Array Name": "",
+            "Data Container Name": ""
+        },
+        "UseMask": 0
+    },
+    "6": {
+        "BoundaryCellsArrayName": "BoundaryCells",
+        "CellFeatureAttributeMatrixPath": {
+            "Attribute Matrix Name": "Grain Data",
+            "Data Array Name": "",
+            "Data Container Name": "SyntheticVolumeDataContainer"
+        },
+        "FeatureIdsArrayPath": {
+            "Attribute Matrix Name": "CellData",
+            "Data Array Name": "FeatureIds",
+            "Data Container Name": "SyntheticVolumeDataContainer"
+        },
+        "FilterVersion": "6.5.138",
+        "Filter_Enabled": true,
+        "Filter_Human_Label": "Find Feature Neighbors",
+        "Filter_Name": "FindNeighbors",
+        "Filter_Uuid": "{97cf66f8-7a9b-5ec2-83eb-f8c4c8a17bac}",
+        "NeighborListArrayName": "NeighborList",
+        "NumNeighborsArrayName": "NumNeighbors",
+        "SharedSurfaceAreaListArrayName": "SharedSurfaceAreaList",
+        "StoreBoundaryCells": 0,
+        "StoreSurfaceFeatures": 1,
+        "SurfaceFeaturesArrayName": "SurfaceFeatures"
+    },
+    "7": {
+        "AvgQuatsArrayName": "AvgQuats",
+        "CellEulerAnglesArrayName": "EulerAngles",
+        "CrystalStructuresArrayPath": {
+            "Attribute Matrix Name": "CellEnsembleData",
+            "Data Array Name": "CrystalStructures",
+            "Data Container Name": "StatsGeneratorDataContainer"
+        },
+        "FeatureEulerAnglesArrayName": "EulerAngles",
+        "FeatureIdsArrayPath": {
+            "Attribute Matrix Name": "CellData",
+            "Data Array Name": "FeatureIds",
+            "Data Container Name": "SyntheticVolumeDataContainer"
+        },
+        "FeaturePhasesArrayPath": {
+            "Attribute Matrix Name": "Grain Data",
+            "Data Array Name": "Phases",
+            "Data Container Name": "SyntheticVolumeDataContainer"
+        },
+        "FilterVersion": "6.5.138",
+        "Filter_Enabled": true,
+        "Filter_Human_Label": "Match Crystallography",
+        "Filter_Name": "MatchCrystallography",
+        "Filter_Uuid": "{7bfb6e4a-6075-56da-8006-b262d99dff30}",
+        "InputStatsArrayPath": {
+            "Attribute Matrix Name": "CellEnsembleData",
+            "Data Array Name": "Statistics",
+            "Data Container Name": "StatsGeneratorDataContainer"
+        },
+        "MaxIterations": 100,
+        "NeighborListArrayPath": {
+            "Attribute Matrix Name": "Grain Data",
+            "Data Array Name": "NeighborList",
+            "Data Container Name": "SyntheticVolumeDataContainer"
+        },
+        "NumFeaturesArrayPath": {
+            "Attribute Matrix Name": "CellEnsembleData",
+            "Data Array Name": "NumFeatures",
+            "Data Container Name": "SyntheticVolumeDataContainer"
+        },
+        "PhaseTypesArrayPath": {
+            "Attribute Matrix Name": "CellEnsembleData",
+            "Data Array Name": "PhaseTypes",
+            "Data Container Name": "StatsGeneratorDataContainer"
+        },
+        "SharedSurfaceAreaListArrayPath": {
+            "Attribute Matrix Name": "Grain Data",
+            "Data Array Name": "SharedSurfaceAreaList",
+            "Data Container Name": "SyntheticVolumeDataContainer"
+        },
+        "SurfaceFeaturesArrayPath": {
+            "Attribute Matrix Name": "Grain Data",
+            "Data Array Name": "SurfaceFeatures",
+            "Data Container Name": "SyntheticVolumeDataContainer"
+        },
+        "VolumesArrayName": "Volumes"
+    },
+    "8": {
+        "CellEulerAnglesArrayPath": {
+            "Attribute Matrix Name": "CellData",
+            "Data Array Name": "EulerAngles",
+            "Data Container Name": "SyntheticVolumeDataContainer"
+        },
+        "CellIPFColorsArrayName": "IPFColor",
+        "CellPhasesArrayPath": {
+            "Attribute Matrix Name": "CellData",
+            "Data Array Name": "Phases",
+            "Data Container Name": "SyntheticVolumeDataContainer"
+        },
+        "CrystalStructuresArrayPath": {
+            "Attribute Matrix Name": "CellEnsembleData",
+            "Data Array Name": "CrystalStructures",
+            "Data Container Name": "StatsGeneratorDataContainer"
+        },
+        "FilterVersion": "6.5.138",
+        "Filter_Enabled": true,
+        "Filter_Human_Label": "Generate IPF Colors",
+        "Filter_Name": "GenerateIPFColors",
+        "Filter_Uuid": "{a50e6532-8075-5de5-ab63-945feb0de7f7}",
+        "GoodVoxelsArrayPath": {
+            "Attribute Matrix Name": "CellData",
+            "Data Array Name": "",
+            "Data Container Name": "SyntheticVolumeDataContainer"
+        },
+        "ReferenceDir": {
+            "x": 0,
+            "y": 0,
+            "z": 1
+        },
+        "UseGoodVoxels": 0
+    },
+    "9": {
+        "FilterVersion": "1.2.812",
+        "Filter_Enabled": true,
+        "Filter_Human_Label": "Write DREAM.3D Data File",
+        "Filter_Name": "DataContainerWriter",
+        "Filter_Uuid": "{3fcd4c43-9d75-5b86-aad4-4441bc914f37}",
+        "OutputFile": "C:\\Users\\work\\Desktop\\2phase_irregularGrid.dream3d",
+        "WriteTimeSeries": 0,
+        "WriteXdmfFile": 1
+    },
+    "PipelineBuilder": {
+        "Name": "2phase_irregularGrid",
+        "Number_Filters": 10,
+        "Version": 6
+    }
+}
diff --git a/python/tests/reference/Grid/2phase_irregularGrid.xdmf b/python/tests/reference/Grid/2phase_irregularGrid.xdmf
new file mode 100644
index 000000000..65d2bdbb4
--- /dev/null
+++ b/python/tests/reference/Grid/2phase_irregularGrid.xdmf
@@ -0,0 +1,42 @@
+<?xml version="1.0"?>
+<!DOCTYPE Xdmf SYSTEM "Xdmf.dtd"[]>
+<Xdmf xmlns:xi="http://www.w3.org/2003/XInclude" Version="2.2">
+ <Domain>
+  <!-- *************** START OF SyntheticVolumeDataContainer *************** -->
+  <Grid Name="SyntheticVolumeDataContainer" GridType="Uniform">
+    <Topology TopologyType="3DCoRectMesh" Dimensions="11 9 14 "></Topology>
+    <Geometry Type="ORIGIN_DXDYDZ">
+      <!-- Origin  Z, Y, X -->
+      <DataItem Format="XML" Dimensions="3">0 0 0</DataItem>
+      <!-- DxDyDz (Spacing/Resolution) Z, Y, X -->
+      <DataItem Format="XML" Dimensions="3">0.8 0.8 0.8</DataItem>
+    </Geometry>
+    <Attribute Name="BoundaryCells" AttributeType="Scalar" Center="Cell">
+      <DataItem Format="HDF" Dimensions="10 8 13 1" NumberType="Char" Precision="1" >
+        2phase_irregularGrid.dream3d:/DataContainers/SyntheticVolumeDataContainer/CellData/BoundaryCells
+      </DataItem>
+    </Attribute>
+    <Attribute Name="EulerAngles" AttributeType="Vector" Center="Cell">
+      <DataItem Format="HDF" Dimensions="10 8 13 3" NumberType="Float" Precision="4" >
+        2phase_irregularGrid.dream3d:/DataContainers/SyntheticVolumeDataContainer/CellData/EulerAngles
+      </DataItem>
+    </Attribute>
+    <Attribute Name="FeatureIds" AttributeType="Scalar" Center="Cell">
+      <DataItem Format="HDF" Dimensions="10 8 13 1" NumberType="Int" Precision="4" >
+        2phase_irregularGrid.dream3d:/DataContainers/SyntheticVolumeDataContainer/CellData/FeatureIds
+      </DataItem>
+    </Attribute>
+    <Attribute Name="IPFColor" AttributeType="Vector" Center="Cell">
+      <DataItem Format="HDF" Dimensions="10 8 13 3" NumberType="UChar" Precision="1" >
+        2phase_irregularGrid.dream3d:/DataContainers/SyntheticVolumeDataContainer/CellData/IPFColor
+      </DataItem>
+    </Attribute>
+    <Attribute Name="Phases" AttributeType="Scalar" Center="Cell">
+      <DataItem Format="HDF" Dimensions="10 8 13 1" NumberType="Int" Precision="4" >
+        2phase_irregularGrid.dream3d:/DataContainers/SyntheticVolumeDataContainer/CellData/Phases
+      </DataItem>
+    </Attribute>
+  </Grid>
+  <!-- *************** END OF SyntheticVolumeDataContainer *************** -->
+ </Domain>
+</Xdmf>