Update index_3.js

index_3.js

@@ -324,7 +324,7 @@
     initialCameraPosition = camera.position.clone();
     initialCameraRotation = camera.rotation.clone();
   
-    canvas.style.background = "#000000";
+    // The canvas background is now controlled by CSS.
     controlsInstance.maxZoom = maxZoom;
     controlsInstance.minZoom = minZoom;
     controlsInstance.minAngle = minAngle;