diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..a264918
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,4 @@
+[submodule "tests/ReFuel.Gltf.Tests/assets/gltf-research-scenes"]
+	path = tests/ReFuel.Gltf.Tests/assets/gltf-research-scenes
+	url = https://github.com/ErfanMo77/gltf-research-scenes.git
+	branch = main
diff --git a/tests/ReFuel.Gltf.Tests/assets/gltf-research-scenes b/tests/ReFuel.Gltf.Tests/assets/gltf-research-scenes
new file mode 160000
index 0000000..2b9fc94
--- /dev/null
+++ b/tests/ReFuel.Gltf.Tests/assets/gltf-research-scenes
@@ -0,0 +1 @@
+Subproject commit 2b9fc945d7016048fe7099d67de9024241714ff3