Ok, This is just a suggestion. It might be hard to do but Im just suggesting if you have time to add the tardis Seethrough feature so players can see the inside of the tardis from the outside. Here is an example. This guy managed to do it. I am not sure can that fit in the current coding, so it might be impossible.
https://www.youtube.com/watch?v=IEpjQWZ1IWI&list=PL4EA342C7C56ED777

Thank you.

EDIT: Im sure someone suggested this already but I just found the video so I thought it might help.