source/blender/render/hydra/engine.cc

@@ -61,6 +61,15 @@ void Engine::sync(Depsgraph *depsgraph, bContext *context)
   scene_delegate_->populate(depsgraph, context);
 }
 
+void Engine::sync_usd(pxr::UsdStageRefPtr stage)
+{
+  if (!usd_delegate_) {
+    usd_delegate_ = std::make_unique<pxr::UsdImagingDelegate>(
+        render_index_.get(), pxr::SdfPath::AbsoluteRootPath().AppendElementString("usd"));
+  }
+  usd_delegate_->Populate(stage->GetPseudoRoot());
+}
+
 void Engine::set_sync_setting(const std::string &key, const pxr::VtValue &val)
 {
   scene_delegate_->set_setting(key, val);

source/blender/render/hydra/engine.h

@@ -10,6 +10,8 @@
 #include <pxr/imaging/hd/pluginRenderDelegateUniqueHandle.h>
 #include <pxr/imaging/hdx/freeCameraSceneDelegate.h>
 #include <pxr/imaging/hgi/hgi.h>
+#include <pxr/usd/usd/stage.h>
+#include <pxr/usdImaging/usdImaging/delegate.h>
 
 #include "RE_engine.h"
 
@@ -29,6 +31,7 @@ class Engine {
   virtual ~Engine() = default;
 
   void sync(Depsgraph *depsgraph, bContext *context);
+  void sync_usd(pxr::UsdStageRefPtr stage);
   virtual void render(Depsgraph *depsgraph) = 0;
 
   void set_sync_setting(const std::string &key, const pxr::VtValue &val);
@@ -50,6 +53,7 @@ class Engine {
   std::unique_ptr<RenderTaskDelegate> render_task_delegate_;
   std::unique_ptr<pxr::HdxFreeCameraSceneDelegate> free_camera_delegate_;
   std::unique_ptr<SimpleLightTaskDelegate> simple_light_task_delegate_;
+  std::unique_ptr<pxr::UsdImagingDelegate> usd_delegate_;
   std::unique_ptr<pxr::HdEngine> engine_;
 };
 

source/blender/render/hydra/python.cc

@@ -3,8 +3,11 @@
 
 #include <Python.h>
 
+#include <boost/python/extract.hpp>
+
 #include <pxr/base/plug/plugin.h>
 #include <pxr/base/plug/registry.h>
+#include <pxr/usd/usd/stage.h>
 #include <pxr/usdImaging/usdImagingGL/engine.h>
 
 #include "BKE_appdir.h"
@@ -157,6 +160,24 @@ static PyObject *engine_sync_func(PyObject * /*self*/, PyObject *args)
   Py_RETURN_NONE;
 }
 
+static PyObject *engine_sync_usd_func(PyObject * /*self*/, PyObject *args)
+{
+  PyObject *pyengine, *pystage;
+  if (!PyArg_ParseTuple(args, "OO", &pyengine, &pystage)) {
+    Py_RETURN_NONE;
+  }
+
+  Engine *engine = (Engine *)PyLong_AsVoidPtr(pyengine);
+
+  boost::python::extract<pxr::UsdStageRefPtr> extract(pystage);
+  pxr::UsdStagePtr stage = extract();
+
+  engine->sync_usd(stage);
+
+  CLOG_INFO(LOG_RENDER_HYDRA, 2, "Engine %016llx", engine);
+  Py_RETURN_NONE;
+}
+
 static PyObject *engine_render_func(PyObject * /*self*/, PyObject *args)
 {
   PyObject *pyengine, *pydepsgraph;
@@ -253,6 +274,7 @@ static PyMethodDef methods[] = {
     {"engine_create", engine_create_func, METH_VARARGS, ""},
     {"engine_free", engine_free_func, METH_VARARGS, ""},
     {"engine_sync", engine_sync_func, METH_VARARGS, ""},
+    {"engine_sync_usd", engine_sync_usd_func, METH_VARARGS, ""},
     {"engine_render", engine_render_func, METH_VARARGS, ""},
     {"engine_view_draw", engine_view_draw_func, METH_VARARGS, ""},
     {"engine_set_sync_setting", engine_set_sync_setting_func, METH_VARARGS, ""},

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

@@ -211,14 +211,14 @@ void BlenderSceneDelegate::populate(Depsgraph *deps, bContext *cont)
 
 void BlenderSceneDelegate::clear()
 {
-  for (auto &it : objects_) {
+  for (auto &obj_data : objects_.values()) {
-    it.second->remove();
+    obj_data->remove();
   }
-  for (auto &it : instancers_) {
+  for (auto &i_data : instancers_.values()) {
-    it.second->remove();
+    i_data->remove();
   }
-  for (auto &it : materials_) {
+  for (auto &mat_data : materials_.values()) {
-    it.second->remove();
+    mat_data->remove();
   }
 
   objects_.clear();
@@ -269,9 +269,9 @@ pxr::SdfPath BlenderSceneDelegate::world_prim_id() const
 ObjectData *BlenderSceneDelegate::object_data(pxr::SdfPath const &id) const
 {
   pxr::SdfPath p_id = (id.GetName().find("SM_") == 0) ? id.GetParentPath() : id;
-  auto it = objects_.find(p_id);
+  auto obj_data = objects_.lookup_ptr(p_id);
-  if (it != objects_.end()) {
+  if (obj_data) {
-    return it->second.get();
+    return obj_data->get();
   }
   InstancerData *i_data = instancer_data(p_id, true);
   if (i_data) {
@@ -297,11 +297,11 @@ LightData *BlenderSceneDelegate::light_data(pxr::SdfPath const &id) const
 
 MaterialData *BlenderSceneDelegate::material_data(pxr::SdfPath const &id) const
 {
-  auto it = materials_.find(id);
+  auto mat_data = materials_.lookup_ptr(id);
-  if (it == materials_.end()) {
+  if (!mat_data) {
     return nullptr;
   }
-  return it->second.get();
+  return mat_data->get();
 }
 
 InstancerData *BlenderSceneDelegate::instancer_data(pxr::SdfPath const &id, bool child_id) const
@@ -322,9 +322,9 @@ InstancerData *BlenderSceneDelegate::instancer_data(pxr::SdfPath const &id, bool
     p_id = id;
   }
 
-  auto it = instancers_.find(p_id);
+  auto i_data = instancers_.lookup_ptr(p_id);
-  if (it != instancers_.end()) {
+  if (i_data) {
-    return it->second.get();
+    return i_data->get();
   }
   return nullptr;
 }
@@ -349,7 +349,7 @@ void BlenderSceneDelegate::update_objects(Object *object)
     return;
   }
 
-  objects_[id] = ObjectData::create(this, object, id);
+  objects_.add_new(id, ObjectData::create(this, object, id));
   obj_data = object_data(id);
   obj_data->update_parent();
   obj_data->init();
@@ -359,8 +359,8 @@ void BlenderSceneDelegate::update_objects(Object *object)
 void BlenderSceneDelegate::update_instancers(Object *object)
 {
   /* Check object inside instancers */
-  for (auto &it : instancers_) {
+  for (auto &i_data : instancers_.values()) {
-    it.second->check_update(object);
+    i_data->check_update(object);
   }
 
   pxr::SdfPath id = instancer_prim_id(object);
@@ -369,7 +369,7 @@ void BlenderSceneDelegate::update_instancers(Object *object)
     if ((object->transflag & OB_DUPLI) == 0) {
       /* Object isn't instancer anymore and should be removed */
       i_data->remove();
-      instancers_.erase(id);
+      instancers_.remove(id);
       return;
     }
 
@@ -386,8 +386,7 @@ void BlenderSceneDelegate::update_instancers(Object *object)
     return;
   }
 
-  instancers_[id] = std::make_unique<InstancerData>(this, object, id);
+  i_data = instancers_.lookup_or_add(id, std::make_unique<InstancerData>(this, object, id)).get();
-  i_data = instancer_data(id);
   i_data->init();
   i_data->insert();
 }
@@ -524,7 +523,7 @@ void BlenderSceneDelegate::add_new_objects()
 void BlenderSceneDelegate::remove_unused_objects()
 {
   /* Get available objects */
-  std::set<std::string> available_objects;
+  Set<std::string> available_objects;
 
   DEGObjectIterSettings settings = {0};
   settings.depsgraph = depsgraph;
@@ -542,67 +541,66 @@ void BlenderSceneDelegate::remove_unused_objects()
               object)
   {
     if (ObjectData::is_supported(object)) {
-      available_objects.insert(object_prim_id(object).GetName());
+      available_objects.add(object_prim_id(object).GetName());
     }
-    available_objects.insert(instancer_prim_id(object).GetName());
+    available_objects.add(instancer_prim_id(object).GetName());
   }
   ITER_END;
 
   /* Remove unused instancers */
-  for (auto it = instancers_.begin(); it != instancers_.end(); ++it) {
+  instancers_.remove_if([&](auto item) {
-    if (available_objects.find(it->first.GetName()) != available_objects.end()) {
+    bool ret = !available_objects.contains(item.key.GetName());
-      /* Remove objects from instancers */
+    if (ret) {
-      it->second->check_remove(available_objects);
+      item.value->remove();
-      continue;
     }
-    it->second->remove();
+    else {
-    instancers_.erase(it);
+      item.value->check_remove(available_objects);
-    it = instancers_.begin();
     }
+    return ret;
+  });
 
   /* Remove unused objects */
-  for (auto it = objects_.begin(); it != objects_.end(); ++it) {
+  objects_.remove_if([&](auto item) {
-    if (available_objects.find(it->first.GetName()) != available_objects.end()) {
+    bool ret = !available_objects.contains(item.key.GetName());
-      continue;
+    if (ret) {
-    }
+      item.value->remove();
-    it->second->remove();
-    objects_.erase(it);
-    it = objects_.begin();
     }
+    return ret;
+  });
 
   /* Remove unused materials */
-  std::set<pxr::SdfPath> available_materials;
+  Set<pxr::SdfPath> available_materials;
-  for (auto &it : objects_) {
+  for (auto &val : objects_.values()) {
-    MeshData *m_data = dynamic_cast<MeshData *>(it.second.get());
+    MeshData *m_data = dynamic_cast<MeshData *>(val.get());
     if (m_data) {
       m_data->available_materials(available_materials);
     }
-    CurvesData *c_data = dynamic_cast<CurvesData *>(it.second.get());
+    CurvesData *c_data = dynamic_cast<CurvesData *>(val.get());
     if (c_data) {
       c_data->available_materials(available_materials);
     }
   }
-  for (auto &it : instancers_) {
+  for (auto &val : instancers_.values()) {
-    it.second->available_materials(available_materials);
+    val->available_materials(available_materials);
   }
-  for (auto it = materials_.begin(); it != materials_.end(); ++it) {
+
-    if (available_materials.find(it->first) != available_materials.end()) {
+  materials_.remove_if([&](auto item) {
-      continue;
+    bool ret = !available_materials.contains(item.key);
-    }
+    if (ret) {
-    it->second->remove();
+      item.value->remove();
-    materials_.erase(it);
-    it = materials_.begin();
     }
+    return ret;
+  });
 }
 
 void BlenderSceneDelegate::update_visibility()
 {
   /* Updating visibility of existing objects/instancers */
-  for (auto &it : objects_) {
+  for (auto &val : objects_.values()) {
-    it.second->update_visibility();
+    val->update_visibility();
   }
-  for (auto &it : instancers_) {
+  for (auto &val : instancers_.values()) {
-    it.second->update_visibility();
+    val->update_visibility();
   }
 
   /* Add objects/instancers which were invisible before and not added yet */

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

@@ -11,6 +11,7 @@
 
 #include "CLG_log.h"
 
+#include "BLI_set.hh"
 #include "curves.h"
 #include "instancer.h"
 #include "light.h"

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

@@ -134,10 +134,10 @@ pxr::SdfPath CurvesData::material_id() const
   return mat_data_->prim_id;
 }
 
-void CurvesData::available_materials(std::set<pxr::SdfPath> &paths) const
+void CurvesData::available_materials(Set<pxr::SdfPath> &paths) const
 {
   if (mat_data_ && !mat_data_->prim_id.IsEmpty()) {
-    paths.insert(mat_data_->prim_id);
+    paths.add(mat_data_->prim_id);
   }
 }
 
@@ -199,7 +199,8 @@ void CurvesData::write_material()
   pxr::SdfPath p_id = scene_delegate_->material_prim_id(mat);
   mat_data_ = scene_delegate_->material_data(p_id);
   if (!mat_data_) {
-    scene_delegate_->materials_[p_id] = std::make_unique<MaterialData>(scene_delegate_, mat, p_id);
+    scene_delegate_->materials_.add_new(
+        p_id, std::make_unique<MaterialData>(scene_delegate_, mat, p_id));
     mat_data_ = scene_delegate_->material_data(p_id);
     mat_data_->init();
     mat_data_->insert();

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

@@ -9,6 +9,7 @@
 #include "BKE_duplilist.h"
 #include "DNA_Curves_types.h"
 
+#include "BLI_set.hh"
 #include "material.h"
 #include "object.h"
 
@@ -29,7 +30,7 @@ class CurvesData : public ObjectData {
   pxr::HdBasisCurvesTopology curves_topology(pxr::SdfPath const &id) const;
   pxr::HdPrimvarDescriptorVector primvar_descriptors(pxr::HdInterpolation interpolation) const;
   pxr::SdfPath material_id() const;
-  void available_materials(std::set<pxr::SdfPath> &paths) const;
+  void available_materials(Set<pxr::SdfPath> &paths) const;
 
  private:
   void write_curves(Curves *curves);

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

@@ -7,8 +7,16 @@
 #include <pxr/base/vt/value.h>
 #include <pxr/usd/sdf/path.h>
 
+#include "BLI_hash.hh"
 #include "DNA_ID.h"
 
+template<> struct blender::DefaultHash<pxr::SdfPath> {
+  uint64_t operator()(const pxr::SdfPath &value) const
+  {
+    return pxr::SdfPath::Hash()(value);
+  }
+};
+
 namespace blender::render::hydra {
 
 class BlenderSceneDelegate;

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

@@ -74,14 +74,14 @@ void InstancerData::insert()
 void InstancerData::remove()
 {
   CLOG_INFO(LOG_RENDER_HYDRA_SCENE, 2, "%s", prim_id.GetText());
-  for (auto &it : mesh_instances_) {
+  for (auto &m_inst : mesh_instances_.values()) {
-    it.second.data->remove();
+    m_inst.data->remove();
   }
   scene_delegate_->GetRenderIndex().RemoveInstancer(prim_id);
 
-  for (auto &it : light_instances_) {
+  for (auto &l_inst : light_instances_.values()) {
-    it.second.transforms.clear();
+    l_inst.transforms.clear();
-    update_light_instance(it.second);
+    update_light_instance(l_inst);
   }
 }
 
@@ -119,17 +119,17 @@ bool InstancerData::update_visibility()
     ID_LOG(2, "");
     auto &change_tracker = scene_delegate_->GetRenderIndex().GetChangeTracker();
     change_tracker.MarkInstancerDirty(prim_id, pxr::HdChangeTracker::DirtyVisibility);
-    for (auto &it : mesh_instances_) {
+    for (auto &m_inst : mesh_instances_.values()) {
-      it.second.data->visible = visible;
+      m_inst.data->visible = visible;
-      for (auto &p : it.second.data->submesh_paths()) {
+      for (auto &p : m_inst.data->submesh_paths()) {
         change_tracker.MarkRprimDirty(p, pxr::HdChangeTracker::DirtyVisibility);
       }
     }
     char name[16];
-    for (auto &it : light_instances_) {
+    for (auto &l_inst : light_instances_.values()) {
-      for (int i = 0; i < it.second.count; ++i) {
+      for (int i = 0; i < l_inst.count; ++i) {
         snprintf(name, 16, "L_%08x", i);
-        change_tracker.MarkRprimDirty(it.second.data->prim_id.AppendElementString(name),
+        change_tracker.MarkRprimDirty(l_inst.data->prim_id.AppendElementString(name),
                                       pxr::HdChangeTracker::DirtyVisibility);
       }
     }
@@ -180,8 +180,8 @@ ObjectData *InstancerData::object_data(pxr::SdfPath const &id) const
 pxr::SdfPathVector InstancerData::prototypes() const
 {
   pxr::SdfPathVector paths;
-  for (auto &it : mesh_instances_) {
+  for (auto &m_inst : mesh_instances_.values()) {
-    for (auto &p : it.second.data->submesh_paths()) {
+    for (auto &p : m_inst.data->submesh_paths()) {
       paths.push_back(p);
     }
   }
@@ -195,7 +195,7 @@ void InstancerData::check_update(Object *object)
   if (m_inst) {
     if (!is_instance_visible(object)) {
       m_inst->data->remove();
-      mesh_instances_.erase(path);
+      mesh_instances_.remove(path);
       scene_delegate_->GetRenderIndex().GetChangeTracker().MarkInstancerDirty(
           prim_id, pxr::HdChangeTracker::AllDirty);
       return;
@@ -216,7 +216,7 @@ void InstancerData::check_update(Object *object)
     if (!is_instance_visible(object)) {
       l_inst->transforms.clear();
       update_light_instance(*l_inst);
-      light_instances_.erase(path);
+      light_instances_.remove(path);
       return;
     }
 
@@ -244,7 +244,7 @@ void InstancerData::check_update(Object *object)
 
     if (do_write_instances) {
       write_instances();
-      if (!mesh_instances_.empty()) {
+      if (!mesh_instances_.is_empty()) {
         scene_delegate_->GetRenderIndex().GetChangeTracker().MarkInstancerDirty(
             prim_id, pxr::HdChangeTracker::AllDirty);
       }
@@ -252,40 +252,39 @@ void InstancerData::check_update(Object *object)
   }
 }
 
-void InstancerData::check_remove(std::set<std::string> &available_objects)
+void InstancerData::check_remove(Set<std::string> &available_objects)
 {
   bool ret = false;
-  for (auto it = mesh_instances_.begin(); it != mesh_instances_.end(); ++it) {
+
-    if (available_objects.find(it->first.GetName()) != available_objects.end()) {
+  mesh_instances_.remove_if([&](auto item) {
-      continue;
+    bool res = !available_objects.contains(item.key.GetName());
-    }
+    if (res) {
-    it->second.data->remove();
+      item.value.data->remove();
-    mesh_instances_.erase(it);
-    it = mesh_instances_.begin();
       ret = true;
-  }
+    };
+    return res;
+  });
+
   if (ret) {
     write_instances();
     scene_delegate_->GetRenderIndex().GetChangeTracker().MarkInstancerDirty(
         prim_id, pxr::HdChangeTracker::AllDirty);
   }
 
-  for (auto it = light_instances_.begin(); it != light_instances_.end(); ++it) {
+  light_instances_.remove_if([&](auto item) {
-    if (available_objects.find(it->first.GetName()) != available_objects.end()) {
+    bool res = !available_objects.contains(item.key.GetName());
-      continue;
+    if (res) {
-    }
+      item.value.transforms.clear();
-    it->second.transforms.clear();
+      update_light_instance(item.value);
-    update_light_instance(it->second);
+    };
-
+    return res;
-    light_instances_.erase(it);
+  });
-    it = light_instances_.begin();
-  }
 }
 
-void InstancerData::available_materials(std::set<pxr::SdfPath> &paths) const
+void InstancerData::available_materials(Set<pxr::SdfPath> &paths) const
 {
-  for (auto &it : mesh_instances_) {
+  for (auto &m_inst : mesh_instances_.values()) {
-    ((MeshData *)it.second.data.get())->available_materials(paths);
+    ((MeshData *)m_inst.data.get())->available_materials(paths);
   }
 }
 
@@ -298,8 +297,8 @@ void InstancerData::update_as_parent()
 
 void InstancerData::update_double_sided(MaterialData *mat_data)
 {
-  for (auto &it : mesh_instances_) {
+  for (auto &m_inst : mesh_instances_.values()) {
-    it.second.data->update_double_sided(mat_data);
+    m_inst.data->update_double_sided(mat_data);
   }
 }
 
@@ -344,11 +343,11 @@ int InstancerData::light_prim_id_index(pxr::SdfPath const &id) const
 void InstancerData::write_instances()
 {
   mesh_transforms_.clear();
-  for (auto &it : mesh_instances_) {
+  for (auto &m_inst : mesh_instances_.values()) {
-    it.second.indices.clear();
+    m_inst.indices.clear();
   }
-  for (auto &it : light_instances_) {
+  for (auto &l_inst : light_instances_.values()) {
-    it.second.transforms.clear();
+    l_inst.transforms.clear();
   }
 
   ListBase *lb = object_duplilist(
@@ -363,7 +362,7 @@ void InstancerData::write_instances()
     if (ob->type == OB_LAMP) {
       LightInstance *inst = light_instance(p_id);
       if (!inst) {
-        inst = &light_instances_[p_id];
+        inst = &light_instances_.lookup_or_add_default(p_id);
         inst->data = std::make_unique<LightData>(scene_delegate_, ob, p_id);
         inst->data->init();
       }
@@ -373,7 +372,7 @@ void InstancerData::write_instances()
     else {
       MeshInstance *inst = mesh_instance(p_id);
       if (!inst) {
-        inst = &mesh_instances_[p_id];
+        inst = &mesh_instances_.lookup_or_add_default(p_id);
         inst->data = std::make_unique<MeshData>(scene_delegate_, ob, p_id);
         inst->data->init();
         inst->data->insert();
@@ -386,23 +385,19 @@ void InstancerData::write_instances()
   free_object_duplilist(lb);
 
   /* Remove mesh intances without indices */
-  for (auto it = mesh_instances_.begin(); it != mesh_instances_.end(); ++it) {
+  mesh_instances_.remove_if([&](auto item) {
-    if (!it->second.indices.empty()) {
+    bool res = item.value.indices.empty();
-      continue;
+    if (res) {
-    }
+      item.value.data->remove();
-    it->second.data->remove();
-    mesh_instances_.erase(it);
-    it = mesh_instances_.begin();
     }
+    return res;
+  });
 
   /* Update light intances and remove instances without transforms */
-  for (auto it = light_instances_.begin(); it != light_instances_.end(); ++it) {
+  light_instances_.remove_if([&](auto item) {
-    update_light_instance(it->second);
+    update_light_instance(item.value);
-    if (it->second.transforms.empty()) {
+    return item.value.transforms.empty();
-      light_instances_.erase(it);
+  });
-      it = light_instances_.begin();
-    }
-  }
 }
 
 void InstancerData::update_light_instance(LightInstance &inst)
@@ -462,20 +457,22 @@ void InstancerData::update_light_instance(LightInstance &inst)
 
 InstancerData::MeshInstance *InstancerData::mesh_instance(pxr::SdfPath const &id) const
 {
-  auto it = mesh_instances_.find(id.GetPathElementCount() == 4 ? id.GetParentPath() : id);
+  auto m_inst = mesh_instances_.lookup_ptr(id.GetPathElementCount() == 4 ? id.GetParentPath() :
-  if (it == mesh_instances_.end()) {
+                                                                           id);
+  if (!m_inst) {
     return nullptr;
   }
-  return const_cast<MeshInstance *>(&it->second);
+  return const_cast<MeshInstance *>(m_inst);
 }
 
 InstancerData::LightInstance *InstancerData::light_instance(pxr::SdfPath const &id) const
 {
-  auto it = light_instances_.find(id.GetPathElementCount() == 4 ? id.GetParentPath() : id);
+  auto l_inst = light_instances_.lookup_ptr(id.GetPathElementCount() == 4 ? id.GetParentPath() :
-  if (it == light_instances_.end()) {
+                                                                            id);
+  if (!l_inst) {
     return nullptr;
   }
-  return const_cast<LightInstance *>(&it->second);
+  return const_cast<LightInstance *>(l_inst);
 }
 
 }  // namespace blender::render::hydra

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

@@ -4,6 +4,8 @@
 #pragma once
 
 #include "BKE_duplilist.h"
+#include "BLI_map.hh"
+#include "BLI_set.hh"
 
 #include "light.h"
 #include "mesh.h"
@@ -41,8 +43,8 @@ class InstancerData : public ObjectData {
   ObjectData *object_data(pxr::SdfPath const &id) const;
   pxr::SdfPathVector prototypes() const;
   void check_update(Object *object);
-  void check_remove(std::set<std::string> &available_objects);
+  void check_remove(Set<std::string> &available_objects);
-  void available_materials(std::set<pxr::SdfPath> &paths) const;
+  void available_materials(Set<pxr::SdfPath> &paths) const;
   void update_as_parent();
   void update_double_sided(MaterialData *mat_data);
 
@@ -56,12 +58,11 @@ class InstancerData : public ObjectData {
   MeshInstance *mesh_instance(pxr::SdfPath const &id) const;
   LightInstance *light_instance(pxr::SdfPath const &id) const;
 
-  pxr::TfHashMap<pxr::SdfPath, MeshInstance, pxr::SdfPath::Hash> mesh_instances_;
+  Map<pxr::SdfPath, MeshInstance> mesh_instances_;
-  pxr::TfHashMap<pxr::SdfPath, LightInstance, pxr::SdfPath::Hash> light_instances_;
+  Map<pxr::SdfPath, LightInstance> light_instances_;
   pxr::VtMatrix4dArray mesh_transforms_;
 };
 
-using InstancerDataMap =
+using InstancerDataMap = Map<pxr::SdfPath, std::unique_ptr<InstancerData>>;
-    pxr::TfHashMap<pxr::SdfPath, std::unique_ptr<InstancerData>, pxr::SdfPath::Hash>;
 
 }  // namespace blender::render::hydra

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

@@ -60,14 +60,14 @@ void MaterialData::update()
   scene_delegate_->GetRenderIndex().GetChangeTracker().MarkSprimDirty(prim_id,
                                                                       pxr::HdMaterial::AllDirty);
   if (prev_double_sided != double_sided) {
-    for (auto &it : scene_delegate_->objects_) {
+    for (auto &obj_data : scene_delegate_->objects_.values()) {
-      MeshData *m_data = dynamic_cast<MeshData *>(it.second.get());
+      MeshData *m_data = dynamic_cast<MeshData *>(obj_data.get());
       if (m_data) {
         m_data->update_double_sided(this);
       }
     }
-    for (auto &it : scene_delegate_->instancers_) {
+    for (auto &i_data : scene_delegate_->instancers_.values()) {
-      it.second->update_double_sided(this);
+      i_data->update_double_sided(this);
     }
   }
 }

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

@@ -7,6 +7,7 @@
 #include <pxr/usd/sdf/assetPath.h>
 #include <pxr/usd/sdf/path.h>
 
+#include "BLI_map.hh"
 #include "DNA_material_types.h"
 
 #include "id.h"
@@ -37,7 +38,6 @@ class MaterialData : public IdData {
   pxr::VtValue material_network_map_;
 };
 
-using MaterialDataMap =
+using MaterialDataMap = Map<pxr::SdfPath, std::unique_ptr<MaterialData>>;
-    pxr::TfHashMap<pxr::SdfPath, std::unique_ptr<MaterialData>, pxr::SdfPath::Hash>;
 
 }  // namespace blender::render::hydra

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

@@ -173,11 +173,11 @@ void MeshData::update_double_sided(MaterialData *mat_data)
   }
 }
 
-void MeshData::available_materials(std::set<pxr::SdfPath> &paths) const
+void MeshData::available_materials(Set<pxr::SdfPath> &paths) const
 {
   for (auto &sm : submeshes_) {
     if (sm.mat_data && !sm.mat_data->prim_id.IsEmpty()) {
-      paths.insert(sm.mat_data->prim_id);
+      paths.add(sm.mat_data->prim_id);
     }
   }
 }
@@ -301,16 +301,15 @@ void MeshData::write_materials()
       m.mat_data = nullptr;
       continue;
     }
+
     pxr::SdfPath p_id = scene_delegate_->material_prim_id(mat);
-    m.mat_data = scene_delegate_->material_data(p_id);
+    m.mat_data = scene_delegate_->materials_
-    if (!m.mat_data) {
+                     .lookup_or_add(p_id,
-      scene_delegate_->materials_[p_id] = std::make_unique<MaterialData>(
+                                    std::make_unique<MaterialData>(scene_delegate_, mat, p_id))
-          scene_delegate_, mat, p_id);
+                     .get();
-      m.mat_data = scene_delegate_->material_data(p_id);
     m.mat_data->init();
     m.mat_data->insert();
   }
-  }
 }
 
 }  // namespace blender::render::hydra

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

@@ -7,6 +7,7 @@
 #include <pxr/imaging/hd/sceneDelegate.h>
 
 #include "BKE_duplilist.h"
+#include "BLI_set.hh"
 
 #include "material.h"
 #include "object.h"
@@ -39,7 +40,7 @@ class MeshData : public ObjectData {
   pxr::SdfPath material_id(pxr::SdfPath const &id) const;
   bool double_sided(pxr::SdfPath const &id) const;
   void update_double_sided(MaterialData *mat_data);
-  void available_materials(std::set<pxr::SdfPath> &paths) const;
+  void available_materials(Set<pxr::SdfPath> &paths) const;
   pxr::SdfPathVector submesh_paths() const;
 
   pxr::HdCullStyle cull_style = pxr::HdCullStyleBackUnlessDoubleSided;

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

@@ -7,6 +7,7 @@
 #include <pxr/base/gf/matrix4d.h>
 
 #include "BKE_layer.h"
+#include "BLI_map.hh"
 #include "DNA_object_types.h"
 
 #include "id.h"
@@ -36,8 +37,7 @@ class ObjectData : public IdData {
   Object *parent_ = nullptr;
 };
 
-using ObjectDataMap =
+using ObjectDataMap = Map<pxr::SdfPath, std::unique_ptr<ObjectData>>;
-    pxr::TfHashMap<pxr::SdfPath, std::unique_ptr<ObjectData>, pxr::SdfPath::Hash>;
 
 pxr::GfMatrix4d gf_matrix_from_transform(float m[4][4]);