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Crimson

Well, I didn't solve it the intended way (which is much more elegant.) But I'm still happy I reached the exit and I learned something.

Thoughts with blindrun [telegra.ph]

TLDR: Incredibly creative chamber with excellent usage of the rolling properties of the ball . Took me a good 2 or 3 hours depending on whether you counted an hour-long break I accidentally recorded (but deleted). I've also cut out some unnecessary parts and sped up others. Can't believe I got it done just right before I went to bed.

When I came back from my 4-year absence from the game, I worried that the Portal 2 mapmaking community had run out of ideas and exhausted every possible intuitive, non-glitchy, interesting combination of puzzle elements. Turns out I was dead wrong, and as long as bright minds like the OG Mevious stick around, we shouldn't have anything to worry about.

I'm not sure what the grate on the panel above the angled is for, or the carved out space to the right of the second laser, and I found the geometry a little awkward - but those are nitpicks. This is an indisputable banger.

Difficulty: 9.25/10
Enjoyed: 8/10

Hadn't I watched the bootstrapping video from Mikeastro before playing, I would've spent much much more time solving the puzzle =P
On a quick note: there seems to be a bug concerning inconsistent ball rolling. The first time I tried, the ball somehow didn't roll straight ahead, but instead slightly to the left (my left as I was waiting on the moving platform), fell into the stairway and then fizzled itself (for some unknown reason). I had to do the entire thing again =(

Effing brilliant!

Mind exploding. Figured it out, whew!

masterpiee

After completing the test and reading the comments, i have a feeling that there's more than one solution. really clever but its very easy to mess up even if you know the answer.

I solved it cheating before reading comments :S. I did stockpile both boxes and ball in the angled wall near the end to jump to the grated pannel and make the final gate. The I came here and a comment that talked about the ball rolling made my light flash.

I had a feeling you wanted me to sustain the laser while a cube is on the piston platform using that cube to redirect the laser in the down position and use the ball to interrupt the sustain at just the right moment and position, using the funnel to hold the ball over the incline that lappears to be out of place to ride the funnel to the exit. You still got it after 10 years.