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/PortalsAndItemsDEMO_1.41.rar/file