Here there is the opportunity to let the portals be planar objects by themselves in space, which begs the question of why to have any spatial elements besides the portals themselves. While the cube would follow the participant's translation in the world, the cube would remain fixed to the orientation of the world . Such a device would act as a compass in all three dimensions. Here are some interesting points and questions raised from the meeting. The de Stijl aesthetic acknowledges the Caresian coordinate system.
Landmarks are just as important in wayfinding as is the grid.
We judge our location in space by these landmarks. I've made a conscious decision to incorporate commons space as a lobby rather than allowing people to port between worlds. The worlds as I have articulated them imply that they take up volume. These containers, if articulated with variety, could become the landmarks themselves. At one end of a scale could be texture maps hanging as abstract planes in space.