diff --git a/src/render/render.cpp b/src/render/render.cpp
index 311320e..8b35f46 100644
--- a/src/render/render.cpp
+++ b/src/render/render.cpp
@@ -1634,6 +1634,7 @@
 
 	void VulkanExample::OnUpdateUIOverlay(vks::UIOverlay *overlay)
 	{
+		GUIFunction guiFunc{};
 		if (overlay->header("Settings")) {
 			if (overlay->checkBox("Wireframe", &wireframe)) {
 				buildCommandBuffers();
@@ -1659,11 +1660,21 @@
 		{
 			if (overlay->button("select model")) 
 			{
-				GUIFunction guiFunc{};
+				
 				std::string strModelFilePath;
 				strModelFilePath = guiFunc.openFileFolderDialog();
 				filePath.glTFModelFilePath = strModelFilePath;
 				loadAssets();
+				
+			}
+			if(overlay->button("select vertexShader"))
+			{
+				
+				std::string strFilePath;
+				strFilePath = guiFunc.openFileFolderDialog();
+				filePath.glTFModelFilePath = strFilePath;
+				loadAssets();
+
 			}
 		}
 	}