diff --git a/src/engine/sample_engine.cpp b/src/engine/sample_engine.cpp
index b379187..c81f8a5 100644
--- a/src/engine/sample_engine.cpp
+++ b/src/engine/sample_engine.cpp
@@ -1099,9 +1099,15 @@ std::vector<std::string> SampleEngine::get_cameras_names()
 void SampleEngine::append_glb(const std::string& filename)
 {
     std::vector<Node*> entities;
-    parse_scene(filename.c_str(), entities);
 
-    main_scene->add_nodes(entities);
+    parse_scene(filename.c_str(), entities, true, scene_root);
+
+    if (!entities.empty()) {
+        assert(!scene_root);
+        assert(entities.size() == 1u);
+        scene_root = static_cast<Node3D*>(entities[0]);
+        main_scene->add_nodes(entities);
+    }
 }
 
 Camera* SampleEngine::get_current_camera()
diff --git a/src/engine/sample_engine.h b/src/engine/sample_engine.h
index 66de248..133bd97 100644
--- a/src/engine/sample_engine.h
+++ b/src/engine/sample_engine.h
@@ -11,6 +11,7 @@
 
 class EntityCamera;
 class MeshInstance3D;
+class Node3D;
 
 class SampleEngine : public Engine {
 
@@ -26,6 +27,8 @@ class SampleEngine : public Engine {
     std::vector<EntityCamera*> cameras;
     bool rotate_scene = false;
 
+    Node3D* scene_root = nullptr;
+
     float camera_interp_speed = 1.0f;
 
     // Vpet connection
diff --git a/src/main.cpp b/src/main.cpp
index 710f3a5..865d702 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -38,12 +38,11 @@ EMSCRIPTEN_BINDINGS(_Class_) {
 
     emscripten::class_<SampleEngine>("Engine")
         .constructor<>()
+        .class_function("getInstance", &SampleEngine::get_sample_instance, emscripten::return_value_policy::reference())
         .function("setEnvironment", &SampleEngine::set_skybox_texture)
         .function("loadGLB", &SampleEngine::load_glb)
-        .function("appendGLB", &SampleEngine::append_glb)
         .function("loadPly", &SampleEngine::load_ply)
         .function("setCameraType", &SampleEngine::set_camera_type)
-        .class_function("getInstance", &SampleEngine::get_sample_instance, emscripten::return_value_policy::reference())
         .function("setCameraLookAtIndex", &SampleEngine::set_camera_lookat_index)
         .function("setCameraSpeed", &SampleEngine::set_camera_speed)
         .function("resetCamera", &SampleEngine::reset_camera)
@@ -55,6 +54,7 @@ EMSCRIPTEN_BINDINGS(_Class_) {
         //.function("getVPETContext", &SampleEngine::get_vpet_context);
         .function("loadTracerScene", &SampleEngine::load_tracer_scene)
         // UHasselt gltf streaming demo
+        .function("appendGLB", &SampleEngine::append_glb)
         .function("getCamera", &SampleEngine::get_current_camera, emscripten::return_value_policy::reference())
         .function("setLightColor", &SampleEngine::set_light_color)
         .function("setLightIntensity", &SampleEngine::set_light_intensity);