This is not a serious action, but it does show you what has changed and so it can be informative.

The image below is showing the difference when I applied the Weak Sky Action.

And now you can more easily see that it changed the doorways, as well as the sky.

My main point in including this action is to remind one to really double check everything, after all the adjustments have been made, just in case something stands out, that wasn't noticed earlier.