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

@@ -280,6 +280,7 @@ void BlenderSceneDelegate::update_objects(Object *object)
   pxr::SdfPath id = object_prim_id(object);
   ObjectData *obj_data = object_data(id);
   if (obj_data) {
+    obj_data->update_parent();
     obj_data->update();
     return;
   }
@@ -288,6 +289,9 @@ void BlenderSceneDelegate::update_objects(Object *object)
   }
   objects_[id] = ObjectData::create(this, object, id);
   obj_data = object_data(id);
+  obj_data->update_parent();
+  obj_data->init();
+  obj_data->insert();
   obj_data->update_visibility();
 }
 

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

@@ -21,7 +21,8 @@ namespace blender::render::hydra {
 extern struct CLG_LogRef *LOG_RENDER_HYDRA_SCENE; /* BSD - Blender Scene Delegate */
 
 class BlenderSceneDelegate : public pxr::HdSceneDelegate {
-  friend MeshData; /* has access to materials and instances */
+  friend ObjectData; /* has access to instances */
+  friend MeshData;  /* has access to materials */
 
  public:
   enum class EngineType { VIEWPORT = 1, FINAL, PREVIEW };

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

@@ -104,7 +104,8 @@ void LightData::update()
 {
   ID_LOG(2, "");
 
-  Light *light = (Light *)((Object *)id)->data;
+  Object *object = (Object *)id;
+  Light *light = (Light *)object->data;
   if (prim_type(light) != prim_type_) {
     remove();
     init();

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

@@ -17,7 +17,7 @@ namespace blender::render::hydra {
 MeshData::MeshData(BlenderSceneDelegate *scene_delegate,
                    Object *object,
                    pxr::SdfPath const &prim_id)
-    : ObjectData(scene_delegate, object, prim_id), parent_(object->parent)
+    : ObjectData(scene_delegate, object, prim_id)
 {
 }
 
@@ -66,20 +66,6 @@ void MeshData::remove()
 void MeshData::update()
 {
   Object *object = (Object *)id;
-  if (parent_ != object->parent) {
-    parent_ = object->parent;
-
-    /* Looking for corresponded instancer and update it as parent */
-    for (Object *ob = parent_; ob != nullptr; ob = ob->parent) {
-      InstancerData *i_data = scene_delegate_->instancer_data(
-          scene_delegate_->instancer_prim_id(ob));
-      if (i_data) {
-        i_data->update_as_parent();
-        break;
-      }
-    }
-  }
-
   pxr::HdDirtyBits bits = pxr::HdChangeTracker::Clean;
   if ((id->recalc & ID_RECALC_GEOMETRY) || (((ID *)object->data)->recalc & ID_RECALC_GEOMETRY)) {
     init();

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

@@ -42,7 +42,6 @@ class MeshData : public ObjectData {
   pxr::VtVec3fArray normals_;
 
   MaterialData *mat_data_ = nullptr;
-  Object *parent_;
 };
 
 }  // namespace blender::render::hydra

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

@@ -13,7 +13,7 @@ namespace blender::render::hydra {
 ObjectData::ObjectData(BlenderSceneDelegate *scene_delegate,
                        Object *object,
                        pxr::SdfPath const &prim_id)
-    : IdData(scene_delegate, (ID *)object, prim_id), transform(pxr::GfMatrix4d(1.0)), visible(true)
+    : IdData(scene_delegate, (ID *)object, prim_id), transform(pxr::GfMatrix4d(1.0))
 {
 }
 
@@ -39,10 +39,6 @@ std::unique_ptr<ObjectData> ObjectData::create(BlenderSceneDelegate *scene_deleg
     default:
       break;
   }
-  if (data) {
-    data->init();
-    data->insert();
-  }
   return data;
 }
 
@@ -78,6 +74,25 @@ bool ObjectData::update_visibility()
   return ret;
 }
 
+void ObjectData::update_parent()
+{
+  Object *object = (Object *)id;
+  if (parent_ != object->parent) {
+    ID_LOG(2, "");
+    parent_ = object->parent;
+
+    /* Looking for corresponded instancer and update it as parent */
+    for (Object *ob = parent_; ob != nullptr; ob = ob->parent) {
+      InstancerData *i_data = scene_delegate_->instancer_data(
+          scene_delegate_->instancer_prim_id(ob));
+      if (i_data) {
+        i_data->update_as_parent();
+        break;
+      }
+    }
+  }
+}
+
 void ObjectData::write_transform()
 {
   transform = gf_matrix_from_transform(((Object *)id)->object_to_world);

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

@@ -24,12 +24,15 @@ class ObjectData : public IdData {
   static bool is_supported(Object *object);
 
   virtual bool update_visibility();
+  void update_parent();
 
   pxr::GfMatrix4d transform;
-  bool visible;
+  bool visible = true;
 
  protected:
   void write_transform();
+
+  Object *parent_ = nullptr;
 };
 
 using ObjectDataMap =