So - can we create new dimensions of our own?

[Zamiel]

I have been casually modding things here and there in my game, and I really think it is about time to get this straight. Lets say art, animations and other assets are not an issue - simply reusing the entire overworld as a region that can be traveled to as one can with a sinkhole - just as an example. Is it possible, and how should I go about figuring out how to do this?

 

Sorry if this has been answered already, but I suppose what I am really asking is 'is the code that would make this possible exposed for editing?' and 'if not, has anyone taken a look at how viable hex editing could be?'.

[NoobModder]

Yes, you can. I suggest checking out the awesome mod "Up and away".

You should take it apart to see how its sky dimension was created. Sadly, I cannot explain how to create another dimension myself.

Hope this helped!