diff --git a/manul/renderer/include/nvrenderer/nvrenderer.h b/manul/renderer/include/nvrenderer/nvrenderer.h
index 7c37ae2f..d9058cb7 100644
--- a/manul/renderer/include/nvrenderer/nvrenderer.h
+++ b/manul/renderer/include/nvrenderer/nvrenderer.h
@@ -80,21 +80,27 @@ class NvRenderer : public gfx_renderer, public MaResourceRegistry {
   virtual gfx::geometrybank_handle Create_Bank() override;
   virtual gfx::geometry_handle Insert(gfx::index_array &Indices,
                                       gfx::vertex_array &Vertices,
+                                      gfx::userdata_array &Userdata,
                                       gfx::geometrybank_handle const &Geometry,
                                       int const Type) override;
   virtual gfx::geometry_handle Insert(gfx::vertex_array &Vertices,
+                                      gfx::userdata_array &Userdata,
                                       gfx::geometrybank_handle const &Geometry,
                                       int const Type) override;
   virtual bool Replace(gfx::vertex_array &Vertices,
+                       gfx::userdata_array &Userdata,
                        gfx::geometry_handle const &Geometry, int const Type,
                        std::size_t const Offset = 0) override;
   virtual bool Append(gfx::vertex_array &Vertices,
+                      gfx::userdata_array &Userdata,
                       gfx::geometry_handle const &Geometry,
                       int const Type) override;
   virtual gfx::index_array const &Indices(
       gfx::geometry_handle const &Geometry) const override;
   virtual gfx::vertex_array const &Vertices(
       gfx::geometry_handle const &Geometry) const override;
+  const gfx::userdata_array &UserData(
+      const gfx::geometry_handle &Geometry) const override;
   virtual material_handle Fetch_Material(std::string const &Filename,
                                          bool const Loadnow = true) override;
   virtual void Bind_Material(material_handle const Material,
diff --git a/manul/renderer/source/nvrenderer.cpp b/manul/renderer/source/nvrenderer.cpp
index 173d87d8..2c7e659f 100644
--- a/manul/renderer/source/nvrenderer.cpp
+++ b/manul/renderer/source/nvrenderer.cpp
@@ -736,7 +736,8 @@ gfx::geometrybank_handle NvRenderer::Create_Bank() {
 
 gfx::geometry_handle NvRenderer::Insert(
     gfx::index_array &Indices, gfx::vertex_array &Vertices,
-    gfx::geometrybank_handle const &Geometry, int const Type) {
+    gfx::userdata_array &Userdata, gfx::geometrybank_handle const &Geometry,
+    int const Type) {
   if (!Type || Type >= TP_ROTATOR) return {};
 
   auto &bank = m_geometry_banks[Geometry.bank - 1];
@@ -765,8 +766,8 @@ gfx::geometry_handle NvRenderer::Insert(
 }
 
 gfx::geometry_handle NvRenderer::Insert(
-    gfx::vertex_array &Vertices, gfx::geometrybank_handle const &Geometry,
-    int const Type) {
+    gfx::vertex_array &Vertices, gfx::userdata_array &Userdata,
+    gfx::geometrybank_handle const &Geometry, int const Type) {
   if (!Type || Type >= TP_ROTATOR) return {};
 
   auto &bank = m_geometry_banks[Geometry.bank - 1];
@@ -834,6 +835,7 @@ gfx::geometry_handle NvRenderer::Insert(
 }
 
 bool NvRenderer::Replace(gfx::vertex_array &Vertices,
+                         gfx::userdata_array &Userdata,
                          gfx::geometry_handle const &Geometry, int const Type,
                          std::size_t const Offset) {
   if (!Type || Type >= TP_ROTATOR) return false;
@@ -879,6 +881,7 @@ bool NvRenderer::Replace(gfx::vertex_array &Vertices,
 }
 
 bool NvRenderer::Append(gfx::vertex_array &Vertices,
+                        gfx::userdata_array &Userdata,
                         gfx::geometry_handle const &Geometry, int const Type) {
   return false;
 }
@@ -903,6 +906,12 @@ gfx::vertex_array const &NvRenderer::Vertices(
       .m_vertices;
 }
 
+const gfx::userdata_array &NvRenderer::UserData(
+    const gfx::geometry_handle &Geometry) const {
+  const static gfx::userdata_array array{};
+  return array;
+}
+
 material_handle NvRenderer::Fetch_Material(std::string const &Filename,
                                            bool const Loadnow) {
   auto filename{Filename};
diff --git a/manul/renderer/source/track_batching.cpp b/manul/renderer/source/track_batching.cpp
index 988f1a5a..65317a4f 100644
--- a/manul/renderer/source/track_batching.cpp
+++ b/manul/renderer/source/track_batching.cpp
@@ -316,6 +316,7 @@ void NvRenderer::GatherTracksForBatching() {
     track_batch.m_material = batch.m_material;
     track_batch.m_geometry_origin = batch.m_geometry_origin;
     std::vector<gfx::basic_vertex> vertices{};
+    std::vector<gfx::vertex_userdata> userdatas{};
     std::vector<gfx::basic_index> indices{};
     for (int j = 0; j < batch.m_tracks.size(); ++j) {
       const auto& track = batch.m_tracks[j];
@@ -344,7 +345,8 @@ void NvRenderer::GatherTracksForBatching() {
     track_batch.m_regions_need_update.resize(
         track_batch.m_draw_commands.size());
     auto bank = Create_Bank();
-    track_batch.m_geometry = Insert(indices, vertices, bank, GL_TRIANGLES);
+    track_batch.m_geometry =
+        Insert(indices, vertices, userdatas, bank, GL_TRIANGLES);
   }
   m_track_quadtree.Build(builder);
 }