Learn how to make awesome, Prey-like portals in Doom Builder--no scripting required!
00:00 Intro
01:29 Shaping the Portals
05:40 Implementing the (Static) Portals
12:45 Testing the Static Portals
14:26 Switching to Interactive Portals
18:07 Testing the Interactive Portals
19:23 3D Floors Warning
22:38 Testing 3D Floors with Portals
24:15 Bonus Clip: Episode One Portal Hub
Tutorial WAD:
http://www.mediafire.com/file/63f7k0r6gjpd2gp/Portal_Tutorial.wad/file
[Bonus]
Episode One Portal WAD:
https://www.mediafire.com/file/yoj3u9v833ej1pm/Portal+Episode+One+Hub.wad/file
I also highly recommend checking out Darkstar Archangel's tutorial in which he shows how to use portals to create a seamless room-over-room effect (an excellent alternative to 3D floors!). You can watch it here:
https://www.youtube.com/watch?v=jBXxVc1X8bE