Ah damn, I fixed it so try it again.
The portal/object destroyer brush entity ("Fivlers" as they called them in the commentary) is trigger_portal_clenser. I checked the "Destroy All" or whatever it's called flag in the properties, but not sure if that changed anything or not. Still haven't tracked down the right material that they used in-game... I hope it's not apart of the new particle system?
some / most of the textures will be pink checker in hammer but turn out fine after compling, kinda weird.
i think all transparent surfaces are. i don't have the hacked portal sdk resources, and HL2 glass is portal proof.
I first tried replacing hl2 with the Portal stuff (followed instructions exactly other than replacing hl2 rather than deathmatch), but when i finished setting up the configuration in hammer, it just closed and would not open again (silent too; no errors but a dialog flashes open then closes). I had made a (manual) backup of hl2, so I restored it. I then tried replacing deathmatch, but hammer continued to not start up at all. I then restored deathmatch as well, then reinstalled SourceSDK, and tried replacing deathmatch again. Still no luck! What could possibly have gone wrong that isn't fixed by reinstallation?!
I can't launch the SDK, and hammer just crashes when i try to use the portal.fgd file. I can't figure out what I'm doing wrong.