diff --git a/example/threejs/sandbox/index.html b/example/threejs/sandbox/index.html
index e248747..8f7eacd 100644
--- a/example/threejs/sandbox/index.html
+++ b/example/threejs/sandbox/index.html
@@ -62,6 +62,7 @@
 			};
 
 			init();
+      alert("for now, back-button (navigation) is only implemented in the AFRAME demo-implementation")
 
 			function init() {
 
@@ -123,7 +124,7 @@
 
         window.XRF = XRF // expose to form
 
-				let file = document.location.search.length > 2 ? document.location.search.substr(1) + document.location.hash : './../../assets/example.gltf#pos=1,0,4&rot=0,-30,0'
+				let file = document.location.search.length > 2 ? document.location.search.substr(1) + document.location.hash : 'example.gltf#pos=1,0,4&rot=0,-30,0'
         $('#model').setAttribute("href","./../../asset/"+file)
 				XRF.navigator.to( file )