Portals to Visible Spaces

To move to a space visible right in front of you, the space itself must remain as it is while the user's position information changes instantaneously within the space. However, there are a few additional problems hidden here.

• For the process of the user moving to another space through a portal to feel natural, not only the user's position but also the direction they are facing, eye level, and other information must feel as though they are changing continuously.
• The space visible through the portal must also appear as it would realistically look.

How should these issues be handled? The video below provides a fairly detailed explanation.