Area Portal Projection?

[Off My Meds]

Hey this is kind of a weird one! But basically I was wondering if its possible to project an area of a map through an area portal (it wouldnt need to show in real time because the area it shows is inaccessible). Sort of like how the portals in the game Portal work visually to display the area 'behind' the portal on the wall you shoot the portal gun.

This doesn't have to be done through an area portal but that was just my initial thought, maybe through some cube map finagling?

Essentially I want to make the inside of a building look bigger than it is and have some potentially trippy illusions, thanks in advance guys!

(I hope this makes sense if not ill try and reexplain)

 

[Off My Meds]

just work shopping here but maybe the three skybox could be used to get this affect, testing some methods now Ill update if anything works : )

 

[Off My Meds]

Alright well, using the skybox works with some tweaking, if theres an easier way to do this let me know, sorry for spastic thread.