Fantastic puzzle! here is my blind playthrough https://youtu.be/6Y249Nrb8gE

@mabelpines Thank you so much for the kind words! Great work solving this tough puzzle. Indeed, the spki remake has a much better design, but the core ideas are already in this one. Glad you enjoyed

I tried the remake version in advance, but it still wasn’t that easy. Coming up with an idea like this is truly amazing. One of my favorites!

@可砸 Thanks a lot for playing! Your solution is slightly unintended, but only because the map is slightly broken - the spki-remake is definitely better than this one. Glad you enjoyed it though!

I've played the spki remake before, so this one didn't feel too tough. Glad most parts stayed similar, hope I didn't miss any key steps. Both versions are super solid, thanks!
https://youtu.be/LAyPww1J0c4

@mentallentil Amazing work!! There is a remake on its way now though (not by me!) that is shaping up to be quite cool... :D

How on earth did this only take me two hours? What a fun map

@Spider_,Dawg Hmm how strange, that should indeed work. Glad it's working now though

Well, it worked fine just now, perhaps the portals weren't placed just exactly perfect or something.

Is this normal? I can't even get past the first Moth portion, the grating is blocking the funnel.
Screenshot
Sorry if this is an obvious oversight.

@KatnBlack Amazing work solving this challenging puzzle :D Glad you enjoyed it!

played a lot of puzzles at this point and this must be the best one so far, very satisfying and rewarding to solve!

@莳韵 Thanks a lot for playing and great work solving it! Indeed, the impact of the reversed funnel was the main idea for this map Glad you liked it!

Excellent pure logic puzzle! I was stuck here for a long time and watched playthrough. I like how the reversed funnel changed the first part.

@SpiderLucas15 Amazing work solving this very tough puzzle :D Glad you enjoyed!

I was so surprised I solved this one that I had to play it twice. Another fantastic map!

Upon watching the intended solution, I'm so mad that I did an unnecessary cube throw/drop (not that it was complicated to pull off, but really unnecessary).

@Calimero I think you are correct; an oversight from my part indeed means that that button is completely unnecessary! Great work solving it :D If I'm correct, your solution should only be a tiny bit different from my intended route, as the button was supposed to be single use anyway
@E L Y T R O N Thank you so much for the high praise! Admittedly I got really lucky with the way this map turned out; everything just happened to fall into place for me. Excellent work solving it though! It's unfortunate that you couldn't get your map to work but I'm certain that you've learnt a lot from the experience

I know I said "Oof" earlier, but I couldn't get this set-up out of my head so I have tried to tackle this as my entry for your remake contest. Don't think I can come up with a way to add more beyond the Moth room, but I just wanted to say this is a VERY challenging and very incredible map. After trying and failing to make something like Butterfly myself, I have immense respect for you.

Hi，Mike.I solved it and then became confused when think of the button cancelled the laser block.I didn‘t use it at all，and I didn’t use any wacky moves.Really confused about how it works in the intended solution.（as my area can‘t get access to those sites）

Oof

Great logic and great moves ! The only thing bad was me Favorited !

I wouldn't call it broken. It's just options for any style of playthrough ;)

@SunnyOst Thanks for playing! This map is indeed a little broken in some places, as has been recently and less resently discovered. Perhaps I should remake it some day, or simply update it to get rid of some unnecessary and unintended little thingies

I also never used the laser field, except I sucked myself in after the reflector and jumped into one the raised walls in the middle to get back. I'm glad to see none of the nonsensical timing&rng solutions I used before that are intended :3

awesome classic map :)

not exploits just slightly fickle

I did a few things I didn't see in other runs. don't know if they were cheating

@PieCreeper12 Thanks! I composed this track myself; you can find it as part of my Portal 2 music package (see my profile for a link). Originally, this track was adapted from one of the tracks on my album "Irrational Points", called "Suspense". You can listen to that for free on either my bandcamp or, if you have it, on Spotify :]

Woah. What is the name of the music?

@Towelie Clegane Wow! Indeed, you solved it perfectly clean without using that button! I can't believe nobody has found that in all the time this map has been up o_O Thanks a lot for sharing your video! I guess it would be better if the button be removed entirely then. I'm glad you liked the puzzle!

While solving mirror symmetry, i realized the similarities with the logic in this one so i came back here and applied all the skills and knowledge mirror symmetry brought me :D
Its basically the same thing ; clever portal swaps

Joric playthrough is outdated, the puzzle doesnt seem to be the same, theres an extra fizzler.
Libbybapa's one is basicly like mine but with extra steps

wow ive just seen the lapidas solution you mentioned. its amazing to see people finding different routes like that to what seems at first to be an impossible puzzle. i think the solution i posted is free of exploit and elegant enough, what do you think ?

https://www.youtube.com/watch?v=rmuhzAQQrtk

@Towelie Clegane Hmm, interesting. Would it perchance be the same as the exploit found by lapicidas a few comments ago? If not, I would indeed be very interested to see it!

I was messing up with that puzzle again and i realized there is a way to solve this easier than the play through posted on the puzzle description, without cheating. A way that does not make any use of the button that shuts down the red laser field. Im curious to know if you knew about it and if yes, why you chose to keep the button. If not, ill gladly show it.

@Talisac Thank you so much :D I'm very happy to hear that you enjoyed it. Excellent work figuring everything out, it's quite a beast indeed :]

Well, that was a hard puzzle! The first half is quite "easy", lot of steps but straight forward, but the second part was hard to figure (when I first get 2 cubes in top area, I really thought I was almost done... hahaha x_x) Nice test, where you use, re-use, use again same and same things; great design!

@lapicidas Thank you so much for the kind words :D It really means a lot, coming from such an amazing player like you.
And thank you very much for the video! Very sneaky, dropping down into those ''return path'' surfaces like that :P Clever - I should patch that some day, but oh well, I might be too lazy for that :]

If you feel like doing an extraordinary puzzle again and there is currently nothing good in the workshop then you have to look at the collection of @Mikeastro. You can always find a jewel there. Like this one, It's a tough nut to crack, but everything is logical and it's also a lot of fun to figure it out. Big compliments, also to @Atom who provided the template version with "Moth".

I even found an alternative route in the last third of the map. A solution in which you only change the funnel once and the button that opens the laser field is also not required.
Here is the unintended path (video starts when you pull up the cube to the exit area):
https://youtu.be/2uAUUdsfXYA

@Burning You can't comment on my profile? Sorry about that, I must have messed up the settings... Anyway, thank you for your comment and congrats on solving Reverberate (I still haven't played it myself :p). I agree that generally time spent and difficulty are strongly correlated, but the "slope" of this correlation can vary quite a bit from person to person. Also, this summer I released a joint work with Leomievs, a map called Isotope, which I dare say is an order of magnitude more complex than this one. If this one is 9/10, that one would fly off the scale... but yeah, difficulty ratings are a pain because it is so subjective and people's scales are so different. At least it is an indication of what to expect, I suppose :]

I was gonna make this comment on your profile, but that didn't seem possible, so it's here. Almost a year ago you suggested a way to find some hard maps, so, thanks for that, and since I don't like spending a long time on a single level it has taken a long time to have the motivation to complete one of them, that being Reverberate by HankyMueller. A couple hours spread over the year in about 30 minute increments. And I think I'd rate that one a 10/10 and this map maybe 9/10 then, or 9.5/10, since I prefer leaving a good amount of room for rating easy maps, really hard maps are much rarer. If essentially no map could be rated 10/10 then it's like reverse Spinal Tap, instead of going up to 11 you only go up to 9, haa. And yeah, sometimes maps take different lengths of time, but I find the correlation between time spent and difficulty to be a strong one.

Still an absolutely brilliant puzzle - on a par with 'Vector', imho.

I think you need the command sv_player_collide_with_laser 0

how is that done ?

@Towelie Clegane Excellent work! I'm glad you enjoyed it. And yeah, it used to be a little trickier than it is today to disable laser collision, sadly. You can always disable it using the console :]

wow that was fun. finally found what seemed impossible to me. laser collision tho, ouch

i tought so but since it has worked first shot at some point i was wondering if it wasnt some weird coded mechanism. anyway thanks for your quick answer

@Towelie Clegane All the required moves are easy to execute and completely reliable. Moving the laser cube with the funnel and hoping it lands in such a way that it lines up with a receiver is quite unreliable, as you've experienced, so it is not necessary to do this to solve the puzzle :]

does solution includes the trick of moving the cube in the tracktor beam, from the elevator side, to have it set into the eye catcher of the elevator, while always standing on the elevator side . sometimes it worked first shot and sometimes it doesnt work so im confused