The True Realm is the world from which Puppeteers and Gods come from. It it mentioned in Hello Charlotte Episode 1 and Hello Charlotte Episode 2, and parts of Hello Charlotte Episode 3 are set in the True Realm. The events of Heaven's Gate take place entirely in the True Realm, with the exeption of the Interludes.
With one looking in, as an observer, and the other directly interacting with the False Realm after death, though, it is unconfirmed if any human besides Charles Eyler formed a world postmortem, despite the theory being created by Vincent.
To view the maps/images used for the True Realm, please visit the Gallery subpage.