Two nights ago I had a lucid dream and I opened a portal for the first time, it was square.

I was just wondering, how do you create portals in your dreams? I had to imagine an invisible wall around it because it was made in thin air, and if I went around it I would get confused and math would start going through my head and changing the subject of the dream......

So what are your portals like? (wow, both of my topics so far involve lucid dreams and the use of portals...)