They would have something like this asset inside them https://www.fab.com/listings/d504b855-bf40-402b-8fa2-eac080739132 Then you can make your estate into an MC Escher painting. Some of the fae ruins already have some MC Escher style shapes to them so they could be added there as well.
Fab.com
These portals are seamless and can work with any physics actor that have the tag "Item" on them. They were designed to be as simple as possible, for good performance and to be easy to work with.Showcase video : https://www.youtube.com/watch?v=0m0gSxqdkgE&t(More here)Try the demo here : https://www.mediafire.com/file/4mbf6guc9wb35cm/PortalsAndIte...