1 files changed, 16 insertions, 6 deletions
diff --git a/source/blender/blenkernel/intern/simulation.cc b/source/blender/blenkernel/intern/simulation.cc
index b4cfa7cf0ef..50770125a18 100644
--- a/source/blender/blenkernel/intern/simulation.cc
+++ b/source/blender/blenkernel/intern/simulation.cc
@@ -87,13 +87,13 @@ static void simulation_free_data(ID *id)
   }
 }
 
-void *BKE_simulation_add(Main *bmain, const char *name)
+static void simulation_foreach_id(ID *id, LibraryForeachIDData *data)
 {
-  Simulation *simulation = (Simulation *)BKE_libblock_alloc(bmain, ID_SIM, name, 0);
-
-  simulation_init_data(&simulation->id);
-
-  return simulation;
+  Simulation *simulation = (Simulation *)id;
+  if (simulation->nodetree) {
+    /* nodetree **are owned by IDs**, treat them as mere sub-data and not real ID! */
+    BKE_library_foreach_ID_embedded(data, (ID **)&simulation->nodetree);
+  }
 }
 
 IDTypeInfo IDType_ID_SIM = {
@@ -110,8 +110,18 @@ IDTypeInfo IDType_ID_SIM = {
     /* copy_data */ simulation_copy_data,
     /* free_data */ simulation_free_data,
     /* make_local */ nullptr,
+    /* foreach_id */ simulation_foreach_id,
 };
 
+void *BKE_simulation_add(Main *bmain, const char *name)
+{
+  Simulation *simulation = (Simulation *)BKE_libblock_alloc(bmain, ID_SIM, name, 0);
+
+  simulation_init_data(&simulation->id);
+
+  return simulation;
+}
+
 void BKE_simulation_data_update(Depsgraph *UNUSED(depsgraph), Scene *UNUSED(scene))
 {
 }