Как сделать портал в garry's mod

Garry's mod addon showcase: the portal gun

Just a quick video just before I hit 300 subs of me reviewing the Portal Gun mod in GMOD! We do stuff like drive cars through portals, shoot stuff through portal and there may be stuff to do with glitchy NPCs and explosives.
Link to Portal Gun: 
Link to map: 
Go check out these mods and tell the creators that Zook sent ya!

Hint for the milestone video: I'll be playing a 2D stealth game.