Update app.py

app.py

@@ -335,6 +335,7 @@ with gr.Blocks(css=css) as demo:
               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 = { 
+                  screenshot: true,
                   pipeline: new BABYLON.DefaultRenderingPipeline(\"default\", true, BABYLON.Engine.LastCreatedScene, [BABYLON.Engine.LastCreatedScene.activeCamera]) 
                 }
               } 
@@ -347,6 +348,7 @@ with gr.Blocks(css=css) as demo:
             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='
               if (!BABYLON.Engine.LastCreatedScene.activeCamera.metadata) {
                 BABYLON.Engine.LastCreatedScene.activeCamera.metadata = { 
+                  screenshot: true,
                   pipeline: new BABYLON.DefaultRenderingPipeline(\"default\", true, BABYLON.Engine.LastCreatedScene, [BABYLON.Engine.LastCreatedScene.activeCamera]) 
                 }
               } 
@@ -357,6 +359,7 @@ with gr.Blocks(css=css) as demo:
             exposure = gr.HTML(value="""<label for='exposure'>Exposure</label><input id='exposure' type='range' style='width:256px;height:1em;' min='0' max='2' step='0.001' oninput='
               if (!BABYLON.Engine.LastCreatedScene.activeCamera.metadata) {
                 BABYLON.Engine.LastCreatedScene.activeCamera.metadata = { 
+                  screenshot: true,
                   pipeline: new BABYLON.DefaultRenderingPipeline(\"default\", true, BABYLON.Engine.LastCreatedScene, [BABYLON.Engine.LastCreatedScene.activeCamera]) 
                 }
               }