I think he is asking you how you created the mechanic of scale and seeing yourself through the doors.
I thought of using camera projecting onto the door as a screen but that doesnt work if you are able to move through it.
I just used a premade portal from here as a base. Because I probably don't have time to figure out how to do it from scratch.
That's exactly what I was asking for, thank you! Very interesting, I'll check it out :)
