I'm pretty sure these aren't real portals, but they look absolutely incredible. Combining some LED lights with a mirror and some cool tricks allowed this husband and wife team to create an awesome effect that looks almost exactly like the portals from Portal.
According to the husband, the effect works via the curvature of the rope.
The cool radial thing is from the LED lights we used in the build, and from the curvature of the rope light around the mirror. I don't know about all LED rope light, but the specific lights we bought from Orange Tree Trade (link is to the blue lights we used) have the LEDs directionally arranged parallel to the rope itself. Thus when we curved the rope light, the LEDs are no longer pointing parallel to the rope and are instead pointing tangentially or slightly outward, creating that cool effect!
We want one. Or two.
Check out more pics here