diff --git a/multi_user/bl_types/bl_volume.py b/multi_user/bl_types/bl_volume.py
index 377bdb9..fc67012 100644
--- a/multi_user/bl_types/bl_volume.py
+++ b/multi_user/bl_types/bl_volume.py
@@ -21,7 +21,7 @@ import mathutils
 from pathlib import Path
 
 from .dump_anything import Loader, Dumper
-from .bl_datablock import BlDatablock
+from .bl_datablock import BlDatablock, get_datablock_from_uuid
 
 
 class BlVolume(BlDatablock):
@@ -39,6 +39,21 @@ class BlVolume(BlDatablock):
         loader.load(target, data)
         loader.load(target.display, data['display'])
 
+        # MATERIAL SLOTS
+        target.materials.clear()
+
+        for mat_uuid, mat_name in data["material_list"]:
+            mat_ref = None
+            if mat_uuid is not None:
+                mat_ref = get_datablock_from_uuid(mat_uuid, None)
+            else:
+                mat_ref = bpy.data.materials.get(mat_name, None)
+
+            if mat_ref is None:
+                raise Exception("Material doesn't exist")
+
+            target.materials.append(mat_ref)
+
     def _construct(self, data):
         return bpy.data.volumes.new(data["name"])
 
@@ -62,6 +77,9 @@ class BlVolume(BlDatablock):
 
         data['display'] = dumper.dump(instance.display)
 
+         # Fix material index
+        data['material_list'] = [(m.uuid, m.name) for m in instance.materials if m]
+
         return data
 
     def _resolve_deps_implementation(self):
@@ -72,6 +90,10 @@ class BlVolume(BlDatablock):
         if external_vdb.exists() and not external_vdb.is_dir():
             deps.append(external_vdb)
 
+        for material in self.instance.materials:
+            if material:
+                deps.append(material)
+
         return deps