diff --git a/example/assets/audio/test.mp3 b/example/assets/audio/test.mp3
deleted file mode 100644
index 5da8bca..0000000
Binary files a/example/assets/audio/test.mp3 and /dev/null differ
diff --git a/example/assets/audio/test.ogg b/example/assets/audio/test.ogg
deleted file mode 100644
index 3648081..0000000
Binary files a/example/assets/audio/test.ogg and /dev/null differ
diff --git a/example/assets/shader.frag b/example/assets/shader.frag
new file mode 100644
index 0000000..1c8c081
--- /dev/null
+++ b/example/assets/shader.frag
@@ -0,0 +1,18 @@
+precision mediump float;
+precision mediump int;
+
+uniform float time;
+
+varying vec3 vPosition;
+varying vec4 vColor;
+
+void main()	{
+
+  vec4 color = vec4( vColor );
+  color.r += sin( vPosition.x * 10.0 + time ) * 0.5;
+  color.g = 0.0;
+  color.b += cos( vPosition.x * 10.0 + time ) * 0.5;
+
+  gl_FragColor = color;
+
+}
diff --git a/example/assets/shader.vert b/example/assets/shader.vert
new file mode 100644
index 0000000..9205b72
--- /dev/null
+++ b/example/assets/shader.vert
@@ -0,0 +1,20 @@
+precision mediump float;
+precision mediump int;
+
+uniform mat4 modelViewMatrix; // optional
+uniform mat4 projectionMatrix; // optional
+
+attribute vec3 position;
+attribute vec4 color;
+
+varying vec3 vPosition;
+varying vec4 vColor;
+
+void main()	{
+
+  vPosition = position;
+  vColor = color;
+
+  gl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );
+
+}
diff --git a/src/3rd/js/aframe/index.js b/src/3rd/js/aframe/index.js
index 6666ee7..b46f015 100644
--- a/src/3rd/js/aframe/index.js
+++ b/src/3rd/js/aframe/index.js
@@ -37,7 +37,7 @@ window.AFRAME.registerComponent('xrf', {
         }
       })
       aScene.renderer.toneMapping = THREE.ACESFilmicToneMapping;
-      aScene.renderer.toneMappingExposure = 1.5;
+      aScene.renderer.toneMappingExposure = 1.25;
       if( !XRF.camera ) throw 'xrfragment: no camera detected, please declare <a-entity camera..> ABOVE entities with xrf-attributes'
 
       // this is just for convenience (not part of spec): hide/show stuff based on VR/AR tags in 3D model 
@@ -76,6 +76,12 @@ window.AFRAME.registerComponent('xrf', {
           let com = blinkControls.components['blink-controls']
           if( com ) com.update({collisionEntities:true})
           else console.warn("xrfragments: blink-controls is not mounted, please run manually: $('[blink-controls]).components['blink-controls'].update({collisionEntities:true})")
+
+          blinkControls.addEventListener('teleported', (e) => {
+            if( e.detail.newPosition.z < 0){
+              console.warn('teleported to negative Z-value: https://github.com/jure/aframe-blink-controls/issues/30')
+            }
+          })
         }
 
         // give headset users way to debug without a cumbersome usb-tapdance
diff --git a/src/3rd/js/index.js b/src/3rd/js/index.js
index 295ed59..7eb4ff6 100644
--- a/src/3rd/js/index.js
+++ b/src/3rd/js/index.js
@@ -11,6 +11,7 @@ xrf.init = function(opts){
     console.log("add #debug=[0-9] to URL to see XR Fragment debuglog")
     xrf.debug = parseInt( ( document.location.hash.match(/debug=([0-9])/) || [0,'0'] )[1] )
   }
+  if( xrf.debug != undefined ) xrf.stats()
 
   xrf.Parser.debug = xrf.debug 
   xrf.detectCameraRig(opts)
@@ -51,6 +52,16 @@ xrf.roundrobin = (frag, store) => {
   return store.rr[label].index = 0
 }
 
+xrf.stats = () => {
+  // bookmarklet from https://github.com/zlgenuine/threejs_stats
+  (function(){
+    for( let i = 0; i < 4; i++ ){
+      var script=document.createElement('script');script.onload=function(){var stats=new Stats();stats.showPanel( i ); 
+        stats.dom.style.marginTop = `${i*48}px`;  document.body.appendChild(stats.dom);requestAnimationFrame(function loop(){stats.update();requestAnimationFrame(loop)});};script.src='//rawgit.com/mrdoob/stats.js/master/build/stats.min.js';document.head.appendChild(script);
+    }
+  })()
+}
+
 xrf.hasTag = (tag,tags) => String(tags).match( new RegExp(`(^| )${tag}( |$)`,`g`) )
 
 // map library functions to xrf
diff --git a/src/3rd/js/three/index.js b/src/3rd/js/three/index.js
index 895b491..7961efe 100644
--- a/src/3rd/js/three/index.js
+++ b/src/3rd/js/three/index.js
@@ -7,7 +7,7 @@ xrf.init = ((init) => function(opts){
   opts.scene.add(scene)
   opts.scene = scene
   init(opts)
-  if( opts.loaders ) Object.values(opts.loaders).map( xrf.patchLoader )
+  //if( opts.loaders ) Object.values(opts.loaders).map( xrf.patchLoader )
 
   xrf.patchRenderer(opts)
   xrf.navigator.init()
@@ -32,21 +32,6 @@ xrf.patchRenderer = function(opts){
 
 }
 
-xrf.patchLoader = function(loader){
-  if( loader.prototype.load.xrf_patched ) return // prevent patching aliased loaders twice
-  loader.prototype.load = ((load) => function(url, onLoad, onProgress, onError){
-    load.call(  this,
-                url,
-                (model) => { 
-                  onLoad(model); 
-                  xrf.parseModel(model,url) 
-                },
-                onProgress,
-                onError)
-  })(loader.prototype.load)
-  loader.prototype.load.xrf_patched = true
-}
-
 xrf.getFile = (url) => url.split("/").pop().replace(/#.*/,'')
 
 // parseModel event is essential for src.js to hook into embedded loaded models
diff --git a/src/3rd/js/three/navigator.js b/src/3rd/js/three/navigator.js
index fc0f8f4..29caebb 100644
--- a/src/3rd/js/three/navigator.js
+++ b/src/3rd/js/three/navigator.js
@@ -53,7 +53,7 @@ xrf.navigator.to = (url,flags,loader,data) => {
           if( xrf.model ) xrf.navigator.pushState( `${dir}${file}`, hash )
           xrf.model = model 
 
-          if( !model.isXRF ) xrf.emit('parseModel',{model,url,file}) // loader.load() does this automatically (but not loader.parse) 
+          if( !model.isXRF ) xrf.parseModel(model,url) // this marks the model as an XRF model
 
           if(xrf.debug ) model.animations.map( (a) => console.log("anim: "+a.name) )
 
@@ -96,7 +96,9 @@ xrf.navigator.init = () => {
 
   window.addEventListener('popstate', function (event){
     if( !xrf.navigator.updateHash.active ){ // ignore programmatic hash updates (causes infinite recursion)
-      xrf.navigator.to( document.location.search.substr(1) + document.location.hash )
+      if( !document.location.hash.match(/pos=/) ){
+        history.back() // go back until we find a position 
+      }else xrf.navigator.to( document.location.search.substr(1) + document.location.hash )
     }
   })
   
@@ -153,6 +155,9 @@ xrf.navigator.updateHash = (hash,opts) => {
 
 xrf.navigator.pushState = (file,hash) => {
   if( file == document.location.search.substr(1) ) return // page is in its default state
+  if( !hash.match(/pos=/) ){
+    history.forward() // go forward until we find a position 
+  }
   window.history.pushState({},`${file}#${hash}`, document.location.pathname + `?${file}#${hash}` )
   xrf.emit('pushState', {file, hash} )
 }
diff --git a/src/3rd/js/three/util/collision.js b/src/3rd/js/three/util/collision.js
index 54895b8..e9915b8 100644
--- a/src/3rd/js/three/util/collision.js
+++ b/src/3rd/js/three/util/collision.js
@@ -1,7 +1,7 @@
 xrf.getCollisionMeshes = () => {
   let meshes = []
   xrf.scene.traverse( (n) => {
-    if( !n.userData.href && !n.userData.src && xrf.hasNoMaterial(n) ){
+    if( n.type == 'Mesh' && !n.userData.href && !n.userData.src && xrf.hasNoMaterial(n) ){
       meshes.push(n)
     }
   })
diff --git a/src/3rd/js/three/xrf/dynamic/URIvars.js b/src/3rd/js/three/xrf/dynamic/URIvars.js
index 65d332a..6777c96 100644
--- a/src/3rd/js/three/xrf/dynamic/URIvars.js
+++ b/src/3rd/js/three/xrf/dynamic/URIvars.js
@@ -4,8 +4,12 @@
 xrf.addEventListener('parseModel', (opts) => {
   let {model,url,file} = opts
   if( model.isSRC || opts.isSRC ) return // ignore SRC models
+
   xrf.URI.vars = new Proxy({},{
-    set(me,k,v){ me[k] = v },
+    set(me,k,v){ 
+      if( k.match(/^(name)$/) ) return
+      me[k] = v 
+    },
     get(me,k  ){ 
       if( k == '__object' ){
         let obj = {}
@@ -33,21 +37,23 @@ xrf.addEventListener('dynamicKeyValue', (opts) => {
   let {id,match,v} = opts
 
   if( !v.is( xrf.XRF.CUSTOMFRAG) ) return // only process custom frags from here
-
+  if( v.string.match(/(<|>)/) )    return // ignore filter values
+    
   // check if fragment is an objectname
   if( match.length > 0 ){
     xrf.frag.dynamic.material(v,opts)
-  }else{
-    if( !xrf.URI.vars[ v.string ] ) return console.warn(`'${v.string}' metadata not found in scene`)            // only assign to known values
-    xrf.URI.vars[ id ] = xrf.URI.vars[ v.string ]     // update var
-    if( xrf.debug ) console.log(`URI.vars[${id}]='${v.string}'`)
-
-    xrf.scene.traverse( (n) => {                      // reflect new changes
-      if( n.userData && n.userData.src && n.userData.srcTemplate && n.userData.srcTemplate.match(`{${id}}`) ){
-        let srcNewFragments = xrf.frag.src.expandURI( n ).replace(/.*#/,'')
-        console.log(`URI.vars[${id}] => updating ${n.name} => ${srcNewFragments}`)
-        let frag = xrf.hashbus.pub( srcNewFragments, n )
-      }
-    })
   }
+  
+  if( !xrf.URI.vars[ v.string ] ) return console.warn(`'${v.string}' metadata not found in scene`)            // only assign to known values
+
+  xrf.URI.vars[ id ] = xrf.URI.vars[ v.string ]     // update var
+  if( xrf.debug ) console.log(`URI.vars[${id}]='${v.string}'`)
+
+  xrf.scene.traverse( (n) => {                      // reflect new changes
+    if( n.userData && n.userData.src && n.userData.srcTemplate && n.userData.srcTemplate.match(`{${id}}`) ){
+      let srcNewFragments = xrf.frag.src.expandURI( n ).replace(/.*#/,'')
+      console.log(`URI.vars[${id}] => updating ${n.name} => ${srcNewFragments}`)
+      let frag = xrf.hashbus.pub( srcNewFragments, n )
+    }
+  })
 })
diff --git a/src/3rd/js/three/xrf/dynamic/filter.js b/src/3rd/js/three/xrf/dynamic/filter.js
index 87b06f8..c89ff2f 100644
--- a/src/3rd/js/three/xrf/dynamic/filter.js
+++ b/src/3rd/js/three/xrf/dynamic/filter.js
@@ -1,12 +1,15 @@
 
-xrf.addEventListener('dynamicKey', (opts) => {
+const doFilter = (opts) => {
   let {scene,id,match,v} = opts
   if( v.filter ){
     let frags = {}
     frags[ v.filter.key ] = v
     xrf.filter.scene({frag:frags,scene})
   }
-})
+}
+
+xrf.addEventListener('dynamicKey', doFilter )
+xrf.addEventListener('dynamicKeyValue', doFilter )
 
 // spec: https://xrfragment.org/#filters
 xrf.filter = function(query, cb){
diff --git a/src/3rd/js/three/xrf/dynamic/material.js b/src/3rd/js/three/xrf/dynamic/material.js
index 59cd371..f603575 100644
--- a/src/3rd/js/three/xrf/dynamic/material.js
+++ b/src/3rd/js/three/xrf/dynamic/material.js
@@ -1,21 +1,26 @@
 xrf.frag.dynamic.material = function(v,opts){
   let {match} = opts
 
-  setMaterial = (mesh,material,reset) => {
-    if( !mesh.materialOriginal ) mesh.materialOriginal = mesh.material
-    if( reset ) mesh.material = mesh.materialOriginal
-    else mesh.material = material
-  }
-
   // update material in case of <tag_or_object>[*]=<materialname>
   let material
   xrf.scene.traverse( (n) => n.material && (n.material.name == v.string) && (material = n.material) )
   if( !material && !v.reset ) return // nothing to do
 
-  if( material ) xrf.frag.dynamic.material.setMatch(match,material,v)
+  xrf.frag.dynamic.material.setMatch(match,material,v)
+}
+
+xrf.frag.dynamic.material.setMaterial = function(mesh,material,reset){
+  if( !mesh.materialOriginal ) mesh.materialOriginal = mesh.material
+  let visible = mesh.material.visible //remember
+  if( reset ){
+    mesh.material = mesh.materialOriginal
+  }else mesh.material = material
+  mesh.material.visible = visible
 }
 
 xrf.frag.dynamic.material.setMatch = function(match,material,v){
+  const setMaterial = xrf.frag.dynamic.material.setMaterial
+
   match.map( (m) => {
     for( let i in m.types ){
       let type = m.types[i]
diff --git a/src/3rd/js/three/xrf/href.js b/src/3rd/js/three/xrf/href.js
index 7c42d10..3374646 100644
--- a/src/3rd/js/three/xrf/href.js
+++ b/src/3rd/js/three/xrf/href.js
@@ -56,7 +56,7 @@ xrf.frag.href = function(v, opts){
 
   let selected = mesh.userData.XRF.href.selected = (state) => () => {
     if( mesh.selected == state ) return // nothing changed 
-    console.log("state="+(selected?'selected':'unselected'))
+
     xrf.interactive.objects.map( (o) => {
       let newState = o.name == mesh.name ? state : false
       if( o.material ){
@@ -93,6 +93,47 @@ xrf.frag.href = function(v, opts){
   }, 0, mesh )
 }
 
+xrf.addEventListener('audioInited', function(opts){
+  let {THREE,listener} = opts
+  opts.audio = opts.audio || {}
+  opts.audio.click    = opts.audio.click || '/example/assets/audio/click.wav'
+  opts.audio.hover    = opts.audio.hover || '/example/assets/audio/hover.wav'
+  opts.audio.teleport = opts.audio.teleport || '/example/assets/audio/teleport.wav'
+
+  let audio = xrf.frag.href.audio = {}
+
+  actions = ['click','hover','teleport']
+  actions.map( (action) => {
+    const audioLoader = new THREE.AudioLoader();
+    audio[action] = new THREE.Audio( xrf.camera.listener )
+    audioLoader.load( opts.audio[action], function( buffer ) {
+      audio[action].setBuffer( buffer );
+    })
+  });
+
+  xrf.addEventListener('href', (opts) => {
+    let v = opts.xrf
+    if( opts.selected ){
+      xrf.frag.href.audio.hover.stop() 
+      xrf.frag.href.audio.hover.play() 
+      return
+    }
+    if( opts.click ){
+      xrf.frag.href.audio.click.stop() 
+      xrf.frag.href.audio.click.play() 
+      return
+    }
+  })
+
+  xrf.addEventListener('navigateLoading', (e) => {
+      xrf.frag.href.audio.click.stop() 
+      xrf.frag.href.audio.teleport.stop() 
+      xrf.frag.href.audio.teleport.play() 
+  })
+
+
+})
+
 /**
  * > above solutions were abducted from [[this|https://i.imgur.com/E3En0gJ.png]] and [[this|https://i.imgur.com/lpnTz3A.png]] survey result
  *
diff --git a/src/3rd/js/three/xrf/src.js b/src/3rd/js/three/xrf/src.js
index c1d8723..8c5dbdf 100644
--- a/src/3rd/js/three/xrf/src.js
+++ b/src/3rd/js/three/xrf/src.js
@@ -13,7 +13,7 @@ xrf.frag.src = function(v, opts){
   if(xrf.debug) console.log(`src.js: instancing ${opts.isLocal?'local':'remote'} object ${url}`)
 
   if( opts.isLocal ){
-        xrf.frag.src.localSRC(url,srcFrag,opts)     // local
+    xrf.frag.src.localSRC(url,srcFrag,opts)     // local
   }else xrf.frag.src.externalSRC(url,srcFrag,opts)  // external file
 
   xrf.hashbus.pub( url.replace(/.*#/,''), mesh)     // eval src-url fragments
@@ -32,7 +32,7 @@ xrf.frag.src.addModel = (model,url,frag,opts) => {
   if( mesh.material && mesh.userData.src ) mesh.material.visible = false  // hide placeholder object
 
   //enableSourcePortation(scene)
-  if( xrf.frag.src.renderAsPortal(mesh) ){
+  if( opts.isPortal ){
     // only add remote objects, because 
     // local scene-objects are already added to scene
     xrf.portalNonEuclidian({...opts,model,scene:model.scene})
@@ -91,15 +91,16 @@ xrf.frag.src.externalSRC = (url,frag,opts) => {
 
 xrf.frag.src.localSRC = (url,frag,opts) => {
   let {model,mesh,scene} = opts
-  setTimeout( () => {
+  //setTimeout( (mesh,scene) => {
     if( mesh.material ) mesh.material = mesh.material.clone() // clone, so we can individually highlight meshes
     let _model = {
       animations: model.animations,
-      scene: scene.clone() // *TODO* opts.isPortal ? scene : scene.clone()
+      scene: scene.clone()
+     // scene: opts.isPortal ? scene : scene.clone() 
     }
     _model.scenes = [_model.scene]
     xrf.frag.src.addModel(_model,url,frag, opts)    // current file 
-  },500 )
+  //},1000,mesh,scene )
 }
 
 // scale embedded XR fragments https://xrfragment.org/#scaling%20of%20instanced%20objects
@@ -136,7 +137,7 @@ xrf.frag.src.scale = function(scene, opts, url){
 xrf.frag.src.filterScene = (scene,opts) => {
   let { mesh, model, camera, renderer, THREE, hashbus, frag} = opts
 
-  scene = xrf.filter.scene({scene,frag,reparent:true}) // *TODO* ,copyScene: opts.isPortal})
+  scene = xrf.filter.scene({scene,frag,reparent:true,copyScene: opts.isPortal})
 
   if( !opts.isLocal ){
     scene.traverse( (m) => {
diff --git a/src/3rd/js/three/xrf/src/audio.js b/src/3rd/js/three/xrf/src/audio.js
index 0df7fa2..acb08cc 100644
--- a/src/3rd/js/three/xrf/src/audio.js
+++ b/src/3rd/js/three/xrf/src/audio.js
@@ -11,13 +11,7 @@ let loadAudio = (mimetype) => function(url,opts){
   let {urlObj,dir,file,hash,ext} = xrf.parseUrl(url)
   let frag = xrf.URI.parse( url )
 
-  /* WebAudio: setup context via THREEjs */
-  if( !camera.listener ){
-    camera.listener = new THREE.AudioListener();
-    // *FIXME* camera vs camerarig conflict
-    (camera.getCam ? camera.getCam() : camera).add( camera.listener );
-  }
-
+  xrf.init.audio()
   let isPositionalAudio = !(mesh.position.x == 0 && mesh.position.y == 0 && mesh.position.z == 0)
   const audioLoader = new THREE.AudioLoader();
   let sound = isPositionalAudio ? new THREE.PositionalAudio( camera.listener) 
@@ -93,11 +87,31 @@ let loadAudio = (mimetype) => function(url,opts){
   })
 
 }
+
+xrf.init.audio = (opts) => {
+  let camera = xrf.camera
+  /* WebAudio: setup context via THREEjs */
+  if( !camera.listener ){
+    camera.listener = new THREE.AudioListener();
+    // *FIXME* camera vs camerarig conflict
+    (camera.getCam ? camera.getCam() : camera).add( camera.listener );
+    xrf.emit('audioInited',{listener:camera.listener, ...opts})
+  }
+}
+xrf.addEventListener('init', xrf.init.audio )
+
 // stop playing audio when loading another scene
 xrf.addEventListener('reset', () => {
-  xrf.scene.traverse( (n)  => n.audio && (n.audio.playXRF({x:0,y:0})) && (n.audio.remove()) )
+  xrf.scene.traverse( (n)  => {
+    if( n.media && n.media.audio ){
+      if( n.media.audio.stop ) n.media.audio.stop()
+      if( n.media.audio.remove ) n.media.audio.remove()
+    }
+  })
 })
 
+
+
 let audioMimeTypes = [
   'audio/x-wav',
   'audio/wav',
diff --git a/src/3rd/js/three/xrf/src/image.js b/src/3rd/js/three/xrf/src/image.js
index af4404b..a87e135 100644
--- a/src/3rd/js/three/xrf/src/image.js
+++ b/src/3rd/js/three/xrf/src/image.js
@@ -33,6 +33,14 @@ xrf.frag.src.type['image/png'] = function(url,opts){
     mesh.material.map = texture
     mesh.material.needsUpdate = true 
     mesh.needsUpdate = true
+
+    //// *TODO* update clones in portals or dont clone scene of portals..
+    //xrf.scene.traverse( (n) => {
+    //  if( n.userData.src == mesh.userData.src && mesh.uuid != n.uuid ){
+    //    n.material = mesh.material
+    //    n.material.needsUpdate = true
+    //  }
+    //})
   } 
 
   let onLoad = (texture) => {
diff --git a/src/3rd/js/three/xrf/src/non-euclidian.js b/src/3rd/js/three/xrf/src/non-euclidian.js
index b52383b..534b829 100644
--- a/src/3rd/js/three/xrf/src/non-euclidian.js
+++ b/src/3rd/js/three/xrf/src/non-euclidian.js
@@ -3,7 +3,6 @@
 xrf.portalNonEuclidian = function(opts){
   let { frag, mesh, model, camera, scene, renderer} = opts
 
-
   mesh.portal = {
     pos: mesh.position.clone(),
     posWorld: new xrf.THREE.Vector3(),
diff --git a/src/3rd/js/three/xrf/src/video.js b/src/3rd/js/three/xrf/src/video.js
index a232f06..14cfdb1 100644
--- a/src/3rd/js/three/xrf/src/video.js
+++ b/src/3rd/js/three/xrf/src/video.js
@@ -41,7 +41,7 @@ let loadVideo = (mimetype) => function(url,opts){
       }
     }
     if( mediafragment == 's' ){
-      video.playbackRate = Math.abs( video.speed ) // html5 video does not support reverseplay :/
+      video.playbackRate = Math.abs( v.x ) // html5 video does not support reverseplay :/
     }
     if( mediafragment == 'loop' ){
       video.looping = true 
@@ -51,7 +51,7 @@ let loadVideo = (mimetype) => function(url,opts){
 
 // stop playing audio when loading another scene
 xrf.addEventListener('reset', () => {
-  xrf.scene.traverse( (n)  => n.video && (n.video.playXRF({x:0,y:0})) && (n.video.remove()) )
+  xrf.scene.traverse( (n)  => n.media && n.media.video && (n.media.video.pause()) && (n.media.video.remove()) )
 })
 
 let videoMimeTypes = [
diff --git a/src/3rd/js/three/xrf/t.js b/src/3rd/js/three/xrf/t.js
index cfb467f..d1b0e9d 100644
--- a/src/3rd/js/three/xrf/t.js
+++ b/src/3rd/js/three/xrf/t.js
@@ -1,4 +1,4 @@
-// this is the global #t mediafragment handler (which affects the 3D animation)
+// this ns the global #t mediafragment handler (which affects the 3D animation)
 
 xrf.frag.t = function(v, opts){
   let { frag, mesh, model, camera, scene, renderer, THREE} = opts
@@ -15,7 +15,7 @@ xrf.frag.t = function(v, opts){
     console.warn('no animations found in model')
     return xrf.emit( v.x == 0 ? 'stop' : 'play',{isPlaying: v.x != 0 })
   }
-
+    
   xrf.mixers.map ( (mixer) => {
     
     mixer.t = v
@@ -91,13 +91,12 @@ xrf.addEventListener('parseModel', (opts) => {
         action.setLoop( xrf.THREE.LoopOnce, )
         action.timeScale = mixer.timeScale
         action.enabled = true
-        if( t && t.x === 0 ) action.play() 
+        if( t && t.x != undefined ) action.play() 
       }
     })
     mixer.setTime(mixer.loop.timeStart)
     mixer.time = Math.abs( mixer.loop.timeStart )
     mixer.update(0)
-    mixer.checkZombies( model.animations)
   }
 
   // monkeypatch: update loop when needed 
@@ -119,6 +118,8 @@ xrf.addEventListener('parseModel', (opts) => {
     mixer.update.patched = true
   }
 
+  mixer.checkZombies( model.animations)
+
   // calculate total duration/frame based on longest animation
   mixer.duration  = 0
   if( model.animations.length ){