Hi, first off, please let me know if I did something wrong whilst setting this up. Thanks, and continue.
Now, the idea I had was an invisible block like a barrier, but a bit different. It would save the images around it and become transparent. This way, you can surround an area with these first, then build something inside said area, and it would look just the same as it was from the outside.
I know, kind of unrealistic, but this is meant for creative worlds or admins trying to make something and not have other players continue to break it.