Anyone know any details about this and or how legit it is? 
Im curious about the implementation. ^_^. Written in 3 weeks? Geez.
Thatās a video.
I supposes itās possible. Not sure how they are rendering the viewports in the portals using Unity.
Anyway this video is great. Itās so delicious and moist.
Seriously though, to the OP:
It depends on your definition of ālegitā. Like, did Valve do this? No, AFAIK releasing videos like this on YouTube really isnāt their MO. Like, is this real or some video fake? It is ālegitā in that sense, Iām quite sure. Most of the comments calling it a fake are pretty technically misinformed.
Any idea Charles on how theyāre projecting the portal view onto the portal?
It wouldnāt happen to be 1.1 beta, now would it?
Not well enough to guess without potentially making a fool of myself 
Well my hats in for 1.1 Beta with token :: wink :: ā¦heheā¦
I think this looks cool and Iām pretty sure itās possible if the levels were extremely optimized. Portal is all 90 degree angle walls so it could be modeled with a low polygon count.
Forest did this in Unity Indie a couple years ago so I donāt think any āmagicā is really happening here. A depth mask shader that ācuts outā the walls would deal with the portal part (which works on the iPhone), but drawing the level multiple times when looking through portals seems like it would be very performance heavy. And then the physics might be toughā¦ but if you āfakedā the physics I think it could work.
Anyway, if this is real and it comes out I know Iād buy it. A remake of the original game in its entirety would probably be too much to do (and wouldnāt work with touch controls since the response time is too slow), but a portable game with simpler rooms and puzzles would be so cool! Some sort of prequel or just a story involving some guinea pig going though the initial Aperture Science test rooms? They could make a simplified game out of that.
But this is obviously a fan made game so their biggest hurdle will be to get Valve to sign off on them doing this. But Valve has a great track record of letting mods and fan made content grow into real games though so Iām hopeful.
Yeah, considering Portal was a student game to begin with. As well as Counterstrike (mod) and Team Fortress (mod)ā¦ and Left 4 Deadā¦ As a matter of fact, probably a teamās best bet for instant success, just add water would be to make a mod/indie project that gets Valveās eye, then let them slap their name on your game and clean it up all professional-like.
I donāt understand how you can go through a portal without near clip plane problems, but I know it must be possible, because I downloaded Portal from Steam (which is free today), and it works. What is the solution? Iāve dropped the near clip plane to as low as it can go, and it still looks broken when you stand in a portal and turn sideways.
(The video from the previous post seems to show that the developer of the Portal clone hasnāt solved the problem, but the video from the first post looked fine to me, probably because the character was falling fast enough through the portals that you never saw the intersection of floor and near clip plane.)
Slightly off topic, but I thought Iād mention that Portal is free on steam for the next two weeks