Most spheres of Maquette have historically exercised extreme caution in how they allow doorways to the material world to exist.  Of course, new doorways open and close sporadically all the time, sometimes within seconds, and many popular mythologies and religions within Maquette are believed to stem from the beings who became trapped within Maquette after going through such doorways.  

There are historical records of spontaneous portals that led to wars as confused humans and lockettes fought over territory that they did not realize was not even part of their own world, and accounts of societies where lockettes and humans lived alongside each other until a spontaneous doorway closed - or a permanent one was closed by force.

Permanent doorways, however, have been rare, and there are numerous historical accounts of doorways being destroyed by force - particularly by adherents of the Artisinal religions, who believe there should only be one doorway, located above their Great Abbey in the Heartlands.

The sphere of Anchorage were the first to challenge this notion, thousands of years ago, setting up permanent doorways (or gates, as they prefer) within the Lazura Ocean long ago.  Records indicate that the residents had, after experiences with a few stranded human ships, developed a taste for the goods humans traded, and sought to make trade more regular - as well as to help return the ships of humans to where they had come from, rather than forcing them to live out their lives in an unfamiliar and occasionally hostile realm.

Initially, most interaction with humans through Anchorage primarily involved trade and tourism, and it proved to be a fairly positive interaction for both species.  As time wore on, though, humans did begin to live within Maquette - typically in spheres such as the Heartlands, Dimensa, and Anchorage that were more habitable for their species.  Some humans even successfully created spheres themselves, a practice that lockettes found fascinating.