diff --git a/Source/Model/Writer/v100/NMR_ModelWriterNode100_Mesh.cpp b/Source/Model/Writer/v100/NMR_ModelWriterNode100_Mesh.cpp
index 9add5edbe..d723d16b1 100644
--- a/Source/Model/Writer/v100/NMR_ModelWriterNode100_Mesh.cpp
+++ b/Source/Model/Writer/v100/NMR_ModelWriterNode100_Mesh.cpp
@@ -131,6 +131,19 @@ namespace NMR {
 		writeStartElement(XML_3MF_ELEMENT_MESH);
 
 		m_pProgressMonitor->SetProgressIdentifier(ProgressIdentifier::PROGRESS_WRITENODES);
+
+		//	Write id of referenced volume data, if any
+		if (m_bWriteVolumetricExtension) {
+			auto pVolumeData = m_pModelMeshObject->getVolumeData();
+			if (pVolumeData) {
+				PPackageResourceID pID = pVolumeData->getPackageResourceID();
+				if (pID->getPath() != m_pModel->currentPath())
+					throw CNMRException(NMR_ERROR_MODELRESOURCE_IN_DIFFERENT_MODEL);
+				writePrefixedIntAttribute(XML_3MF_NAMESPACEPREFIX_VOLUMETRIC, XML_3MF_ATTRIBUTE_MESH_VOLUMEDATA, pID->getModelResourceID());
+			}
+		}
+		
+
 		// Write Vertices
 		writeStartElement(XML_3MF_ELEMENT_VERTICES);
 		for (nNodeIndex = 0; nNodeIndex < nNodeCount; nNodeIndex++) {
diff --git a/Source/Model/Writer/v100/NMR_ModelWriterNode100_Model.cpp b/Source/Model/Writer/v100/NMR_ModelWriterNode100_Model.cpp
index 43333782a..4f01e6c5b 100644
--- a/Source/Model/Writer/v100/NMR_ModelWriterNode100_Model.cpp
+++ b/Source/Model/Writer/v100/NMR_ModelWriterNode100_Model.cpp
@@ -865,8 +865,15 @@ namespace NMR {
 		implicitWriter.writeImplicitFunctions();
 	}
 
-	void CModelWriterNode100_Model::writeMultiProperties()
+	void CModelWriterNode100_Model::writeVolumeData()
 	{
+		CModelWriterNode_VolumeData volumeWriter(m_pModel, m_pXMLWriter,
+													m_pProgressMonitor);
+		volumeWriter.writeToXML();
+	}
+
+    void CModelWriterNode100_Model::writeMultiProperties()
+        {
 		nfUint32 nCount = m_pModel->getMultiPropertyGroupCount();
 
 		for (nfUint32 nIndex = 0; nIndex < nCount; nIndex++)
@@ -915,6 +922,9 @@ namespace NMR {
 			if (m_bWriteImplicitExtension) {
 				writeImplicitFunctions();
 			}
+			if (m_bWriteVolumetricExtension) {
+				writeVolumeData();
+			}
 			if (m_bWriteObjects)
 				writeObjects();
 		}