Portal 2

Portal 2

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Darkness and Light

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Darkness and Light

In 2 collections by Bisqwit
Bisqwit's difficult puzzles
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Bisqwit's puzzles with custom visuals
11 items
This difficult puzzle involves lasers, light bridges and an edgeless safety cube.
Warning: Involves extreme lighting conditions.

Note: The little tunnel serves as a reset button. Press the button, and you'll be given option to return the beginning of the puzzle with almost all puzzle elements reset as they were in the beginning. In my own playtesting I found this extremely helpful.

Stuck? Watch the annotated walkthrough at: http://www.youtube.com/watch?v=tZEvODRLQw0.

P.S. I appreciate if you can record your blind playthrough as a set of .dem files, or as a YouTube video! I love watching those, for they are invaluable developer feedback. I will do the same for your map. Instructions for making .dem recordings can be found in my user profile.

P.P.S. Can you trap yourself? The player is encouraged to try it!
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TropiKo Mar 4, 2016 @ 4:42am 
blind demo
Sorry for the pause bug at 9:10.

I've tried it twice after the demo.
Even if I can make the sphere go to it's place I still need the first laser, there's no way I can go across the water without using both portals.
I did figure how to get the sphere on that platform without using 2 portals using physics (I know I'm desperate and looking for the wrong solutions) but even then I still have to put in in the receptacle and I still need to be physically there.
I don't get this bit, I'll have to look harder for something else.

P.S. nice laser closed loop :D
Bisqwit  [author] Mar 15, 2014 @ 4:25pm 
Allright! I updated this map. It includes many small cosmetic updates, and a particular update to the section where the lightbridge problem was that you mentioned.
Ravoria Mar 15, 2014 @ 3:04pm 
you only place one. two and yeah, almost impossible to put a portal there
Bisqwit  [author] Mar 15, 2014 @ 2:43pm 
I also tried placing some light strips on the sides of the portal magnet, but it only resulted it being nearly impossible to place any portal at all.
Ravoria Mar 15, 2014 @ 2:20pm 
Yeah I found your portal magnet, but I still managed to get some other portals somehow. But I guess for all intents and purposes they work the same way
Bisqwit  [author] Mar 15, 2014 @ 1:27pm 
The spot where the laser hits in the ground is already guarded with a portal magnet. You can't place a portal on it except by one orientation only. You will discover this in about 3 seconds. Unless we are talking about some other laser in the map...? I'm sorry if I'm being obstinate here.
I will try to do something about the light bridge. I'm trying some solutions right now... Mainly involving some knee-hight obstacles that would stop the light bridge but still allow portalling and other actions... But I don't want to create a new platform for the cube, so it is involving.
Ravoria Mar 14, 2014 @ 6:38pm 
Oh, i mean stick a strip on the spot the laser hits so that we can't place diagonal portals (as the strip reduces the size of the tile). It's not really necessary, but I doubt I'm the only one who tried to get the laser coming out of the bottom of that portal as the final step. I'm glad that didn't work though, your solution was better. And about the bridge, what I mean is that the bridge will hit the cube, lift it, and for some reason when the bridge is removed the cube will tip and break the connection, thus dropping you in the drink or at least resetting all progress. This is nasty because once you accidentally lift the cube, it's hard to make it safe again without losing the laser. You could fix it by changing the geometry so that the player won't ever line up the cube and the portal they use to get onto the bridge.
Bisqwit  [author] Mar 14, 2014 @ 2:45pm 
Thanks Ravoria! Really good feedback there. The light bridge goes through the door, and this is unavoidable. I decided to ascend that glitch. You can use that as part of the solution if you like; it is not necessary though. However, I can't figure out what you mean by the light strip thing. Could you illustrate it please? Lastly about the lightbridge: Yes, replacing the wrong portal and undoing one's lightbridge is certainly a nasty thing when it happens. That's why there are autosaves (and manual saves) though. If I ever get a bright idea to mitigate that, I'll see about it. I will check your map now!
Ravoria Mar 11, 2014 @ 9:19pm 
Enjoyable test, though the light room was a bit overly annoying. It took me ages to figure out how to do the trick at the end properly, which was sad given I've used something similar. Felt really good to finally solve this. Only thing I can recommend is to put a light strip on the surface the laser in the white room hits, this will make it obvious that one (impossible) alternate solution is impossible. Also, I think this was intended, but the light bridge goes through the door; I've never seen that before. And if you can do something about the players accidentally killing themselves with the bridge by moving portal surfaces so the bridge doesn't nudge the cube, that would save people some time.
My map: http://steamcommunity.com/sharedfiles/filedetails/?id=234519746
Bisqwit  [author] Nov 22, 2013 @ 11:06am 
Thanks lord_dhaf!