diff --git a/example/assets/index.glb b/example/assets/index.glb
index f27e8b5..4988b4c 100644
Binary files a/example/assets/index.glb and b/example/assets/index.glb differ
diff --git a/src/3rd/js/three/xrf/src.js b/src/3rd/js/three/xrf/src.js
index 2ffb34d..e41682c 100644
--- a/src/3rd/js/three/xrf/src.js
+++ b/src/3rd/js/three/xrf/src.js
@@ -6,8 +6,17 @@ xrf.frag.src = function(v, opts){
 
   if( mesh.isSRC ) return // only embed src once 
 
+  // correct for relative urls
+  if( v.string.charAt(0) != '#' && xrf.URI.isRelative( xrf.URI.parse( v.string ) ) ){
+    console.log("-"+v.string.charAt(0)+"-")
+    console.log(v.string)
+    v.string = xrf.navigator.URI.URN + v.string 
+    console.log(v.string)
+  }
+
   let url       = xrf.frag.src.expandURI( mesh, v.string )
   let srcFrag   = opts.srcFrag = xrfragment.URI.parse(url).XRF
+
   opts.isLocal  = v.string[0] == '#'
   opts.isPortal = xrf.frag.src.renderAsPortal(mesh)
   opts.isSRC    = mesh.isSRC = true 
diff --git a/src/3rd/js/three/xrf/src/glsl.js b/src/3rd/js/three/xrf/src/glsl.js
index 52c6940..9748bae 100644
--- a/src/3rd/js/three/xrf/src/glsl.js
+++ b/src/3rd/js/three/xrf/src/glsl.js
@@ -19,6 +19,7 @@ xrf.frag.src.type['x-shader/x-fragment'] = function(url,opts){
   }
   
   var onShaderLoaded = ((args) => (type, status, code) => {
+    if( !code ) return console.error('could not load shader')
     shader[type].status = status 
     shader[type].code   = code 
     if( shader.fragment.code && shader.vertex.code ){