diff --git a/source/client/components/CVAudioManager.ts b/source/client/components/CVAudioManager.ts
index bbcdc805..83c7c988 100644
--- a/source/client/components/CVAudioManager.ts
+++ b/source/client/components/CVAudioManager.ts
@@ -296,7 +296,7 @@ export default class CVAudioManager extends Component
 
     stop()
     {  
-        if(!this.audioPlayer) {//Notification.show(`PLAYINGA`, "warning");
+        if(!this.audioPlayer) {
             return;
         }    
         this.pause();
@@ -357,6 +357,7 @@ export default class CVAudioManager extends Component
             track.setAttribute("default", "");
             this.audioPlayer.append(track);
             track.addEventListener("cuechange", this.onCueChange);
+            track.addEventListener("load", this.onLoadTrack);
         }
     }
 
@@ -368,6 +369,16 @@ export default class CVAudioManager extends Component
         this.ins.activeCaption.setValue(activeText);
     }
 
+    // One-time setup after data is loaded
+    protected onLoadTrack = (event: Event) =>
+    {
+        // Cues starting at zero cause issues, so add a small offset
+        const cues = (this.audioPlayer.children[0] as HTMLTrackElement).track.cues;
+        if(cues[0].startTime === 0) {
+            cues[0].startTime = 0.01;
+        }
+    }
+
     // Handle audio time elapsed updates
     protected onTimeChange = (event: Event) =>
     {
diff --git a/source/client/components/CVModel2.ts b/source/client/components/CVModel2.ts
index 2c87a309..8daf46ca 100644
--- a/source/client/components/CVModel2.ts
+++ b/source/client/components/CVModel2.ts
@@ -29,6 +29,7 @@ import { EDerivativeQuality, EDerivativeUsage, EUnitType, IModel, ESideType, TSi
 
 import unitScaleFactor from "../utils/unitScaleFactor";
 import UberPBRMaterial, { EShaderMode } from "../shaders/UberPBRMaterial";
+import UberPBRAdvMaterial from "../shaders/UberPBRAdvMaterial";
 import Derivative from "../models/Derivative";
 import DerivativeList from "../models/DerivativeList";
 
@@ -495,7 +496,7 @@ export default class CVModel2 extends CObject3D
     {
         const shader = this.ins.shader.getValidatedValue();
         this.object3D.traverse(object => {
-            const material = object["material"] as UberPBRMaterial;
+            const material = object["material"] as UberPBRMaterial | UberPBRAdvMaterial;
             if (material && material.isUberPBRMaterial) {
                 material.setShaderMode(shader);
             }
@@ -541,7 +542,7 @@ export default class CVModel2 extends CObject3D
         const ins = this.ins;
 
         this.object3D.traverse(object => {
-            const material = object["material"] as UberPBRMaterial;
+            const material = object["material"] as UberPBRMaterial | UberPBRAdvMaterial;
             if (material && material.isUberPBRMaterial) {
                 material.aoMapMix.setScalar(ins.occlusion.value);
                 material.color.fromArray(ins.color.value);
@@ -551,6 +552,7 @@ export default class CVModel2 extends CObject3D
                 material.roughness = ins.roughness.value;
                 material.metalness = ins.metalness.value;
                 material.side = ins.doubleSided.value ? DoubleSide : FrontSide;
+                material.needsUpdate = true;
             }
         });
     }
@@ -706,7 +708,7 @@ export default class CVModel2 extends CObject3D
                 // update shadow render side
                 if(this.ins.shadowSide.value != ESideType.Back) {
                     this.object3D.traverse(object => {
-                        const material = object["material"] as UberPBRMaterial;
+                        const material = object["material"] as UberPBRMaterial | UberPBRAdvMaterial;
                         if (material && material.isUberPBRMaterial) {
                             if(this.ins.shadowSide.value == ESideType.Front) {
                                 material.shadowSide = FrontSide;
@@ -714,6 +716,7 @@ export default class CVModel2 extends CObject3D
                             else {
                                 material.shadowSide = BackSide;
                             }
+                            material.needsUpdate = true;
                         }
                     });
                 }