Update app.py

app.py

@@ -333,10 +333,15 @@ with gr.Blocks(css=css) as demo:
             result = gr.Model3D(label="3D Mesh", clear_color=[0.5, 0.5, 0.5, 0.0], camera_position=[0, 90, 0])
             html = gr.HTML(value="""<label for='zoom'>Zoom</label><input id='zoom' type='range' style='width:256px;height:1em;' min='0.157' max='1.57' step='0.001' oninput='
               BABYLON.Engine.LastCreatedScene.getNodes()[1].material.pointSize = Math.ceil(Math.log2(Math.PI/this.value));
+              if (!BABYLON.Engine.LastCreatedScene.activeCamera.metadata) {
+                BABYLON.Engine.LastCreatedScene.activeCamera.metadata = { 
+                  pipeline: new BABYLON.DefaultRenderingPipeline(\"default\", true, BABYLON.Engine.LastCreatedScene, [BABYLON.Engine.LastCreatedScene.activeCamera]) 
+                }
+              } 
               BABYLON.Engine.LastCreatedScene.activeCamera.metadata.pipeline.samples = 4; 
               BABYLON.Engine.LastCreatedScene.activeCamera.fov = this.value;
               this.parentNode.childNodes[2].innerText = BABYLON.Engine.LastCreatedScene.activeCamera.fov;
-              document.getElementsByClassName(\"model3D\")[0].getElementsByTagName(\"canvas\")[0].style.filter = \"blur(\" + BABYLON.Engine.LastCreatedScene.getNodes()[1].material.pointSize + \"px)\";
+              document.getElementsByClassName(\"model3D\")[0].getElementsByTagName(\"canvas\")[0].style.filter = \"blur(\" + BABYLON.Engine.LastCreatedScene.getNodes()[1].material.pointSize/2.0 + \"px)\";
             '/><span>0.8</span>""")
             camera = gr.HTML(value="<a href='#' onclick=\"BABYLON.Engine.LastCreatedScene.activeCamera.radius=0;\">reset camera</a>")
             contrast = gr.HTML(value="""<label for='contrast'>Contrast</label><input id='contrast' type='range' style='width:256px;height:1em;' min='0' max='2' step='0.001' oninput='