source/blender/render/hydra/scene_delegate/blender_scene_delegate.cc

@@ -170,6 +170,11 @@ void BlenderSceneDelegate::add_update_object(Object *object)
   if ((object->transflag & OB_DUPLI) && InstancerData::supported(object)) {
     add_update_instancer(object);
   }
+  InstancerData *i_data = instancer_data(object);
+  if (i_data) {
+    i_data->update();
+  }
+
   pxr::SdfPath id = ObjectData::prim_id(this, object);
   ObjectData *obj_data = object_data(id);
   if (obj_data) {
@@ -233,6 +238,18 @@ InstancerData *BlenderSceneDelegate::instancer_data(pxr::SdfPath const &id, bool
   return dynamic_cast<InstancerData *>(object_data(id.GetParentPath()));
 }
 
+InstancerData *BlenderSceneDelegate::instancer_data(Object *object)
+{
+  InstancerData *i_data;
+  for (auto &it : objects) {
+    i_data = dynamic_cast<InstancerData *>(it.second.get());
+    if (i_data && i_data->is_base(object)) {
+      return i_data;
+    }
+  }
+  return nullptr;
+}
+
 void BlenderSceneDelegate::populate(Depsgraph *deps, bContext *cont)
 {
   bool is_populated = depsgraph != nullptr;

source/blender/render/hydra/scene_delegate/blender_scene_delegate.h

@@ -58,6 +58,7 @@ class BlenderSceneDelegate : public pxr::HdSceneDelegate {
   LightData *light_data(pxr::SdfPath const &id);
   MaterialData *material_data(pxr::SdfPath const &id);
   InstancerData *instancer_data(pxr::SdfPath const &id, bool base_prim = false);
+  InstancerData *instancer_data(Object *object);
 
   void add_update_object(Object *object);
   void add_update_instancer(Object *object);

source/blender/render/hydra/scene_delegate/instancer.cc

@@ -121,6 +121,11 @@ VtIntArray InstancerData::instance_indices()
   return ret;
 }
 
+bool InstancerData::is_base(Object *object) const
+{
+  return (ID *)object == id;
+}
+
 void InstancerData::insert()
 {
   CLOG_INFO(LOG_BSD, 2, "%s", ((ID *)parent_obj)->name);
@@ -151,6 +156,14 @@ void InstancerData::update()
   pxr::HdDirtyBits bits = pxr::HdChangeTracker::Clean;
   unsigned int recalc = ((ID *)parent_obj)->recalc;
 
+  Object *object = (Object *)id;
+  if ((id->recalc & ID_RECALC_GEOMETRY) || (((ID *)object->data)->recalc & ID_RECALC_GEOMETRY)) {
+    init();
+    scene_delegate->GetRenderIndex().GetChangeTracker().MarkRprimDirty(
+        p_id, pxr::HdChangeTracker::AllDirty);
+    return;
+  }
+
   if ((recalc & ID_RECALC_GEOMETRY) || (((ID *)parent_obj->data)->recalc & ID_RECALC_GEOMETRY)) {
     init();
     bits = pxr::HdChangeTracker::AllDirty;
@@ -168,7 +181,6 @@ void InstancerData::update()
   if (bits != pxr::HdChangeTracker::Clean) {
     scene_delegate->GetRenderIndex().GetChangeTracker().MarkInstancerDirty(instancer_id, bits);
   }
-  //scene_delegate->GetRenderIndex().GetChangeTracker().MarkRprimDirty(p_id, bits);
 }
 
 }  // namespace blender::render::hydra

source/blender/render/hydra/scene_delegate/instancer.h

@@ -29,6 +29,7 @@ class InstancerData : public MeshData {
   pxr::HdPrimvarDescriptorVector instancer_primvar_descriptors(pxr::HdInterpolation interpolation);
   pxr::VtIntArray instance_indices();
 
+  bool is_base(Object *object) const;
   pxr::SdfPath instancer_id;
 
  private: