[usea]

> But certainly the game Portal (2007) hyped using portals for rendering prior to Prey.

They were referring to Prey (2006).

[Tempat]

Also worth noting that Prey (2006) started development in 1995.

[keyringlight]

There are a handful of videos from E3 (97 or 98) showing off the original 3DRealms development of Prey. One of the things that didn't survive into Human Head's version on the Doom3 engine was rotating portals, or if they did they were rare that I don't remember them.