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THE CORE: RELOADED 8 - Terminal Tangent

that was the nightmareish side of the plot yes :) the mechanic that has the sphere travel up with the elevator instead of you came from a joke :)

That explains the unused surface below... you should definitely remove that bridge option. And it seems that the upper floor surface should only be accessible AFTER you flung over to the exit area. I guess it's meant as a rescue option if you forgot the sphere, so why not make it a hidden wall surface? o.O
According to my opinion there should only be ONE possible solution to a chamber and every player needs to be forced to find it, no alternatives, no glitches, no nothing. A solution needs to feel 100% intended.

Btw hilarious ending!
("you are free now" ... "you thought I was talking to you, didn't you?")
XD

oh it's that pesky bridge that you can just put a portal on ... I'm not sure if I should remove this, just to leave this inventive option open. The way you normally do that latest part is to place a portal on one of these swing plates below the bridge and you'll fly over the fluid pond arriving at the exit door

P.S. It's a cute version of GLaDOS :-)
If anyone still wants to see the solution, I've played it on my stream recently. Sorry, I usually don't advertise my videos or streams, it's just because people are missing a walkthough. Plus, my content is German, so usually nobody wants to see this ^^

Here's were the map begins: https://youtu.be/T0laMDpm9N8?t=3725

And here's the solution of what most people are struggling with I guess: https://youtu.be/T0laMDpm9N8?t=5228

Thumbs up, as for every part, so imagine me praising each one in the comments, but let me say this part has some flaws imo. Nice idea with "the race", but for me it was not obvious enough, in other words several elements were distracting.
I wasn't aware that the tube system was already activated (since it looked closed) so I brought up the cube manually, which can be hard while flinging, but when I realized the upper catwalk was portalable I tried it that way which was easier but not easy! Why is it portalable??? You never need that.
So I was up there trying to beat the timer by positioning the cube and "running" to the other side which was impossible.
The chamber just didn't give me the impression that it's possible to outrun the cube by flinging :-P

No, since the puzzle maker came out I actually stopped doing portal maps, it's also because i played the main campaign a couple of times and well, inspiration also dryed a bit up and I wanted to explore more interesting things. I got inspired for this whole thing by portal 1's "companion cube" level :). I needed another angle before I was going to make something new for portal.

Also working with hammer (with all the crashes and hours of lost work), is a bit demotiviating.

I agree, plus, I only came up with that trick because I was missing the more obvious solution. Do you have any other series?

Whatever method you find to complete that map is sure going to be a crafty one. I bet I could "fix" it by disallowing that surface to receive a portal, prolly would have to change the texture or add a blocker or change geometry there. If I find the original vmf file I could probably add the fix, but ingenious workarounds are cool :)

I don't know if this was the canon solution, but my method wasn't quite as much a race. Here's what I did: I left the ball at the bottom, I see-saw jumped all the way to the top, put a portal on the thin bridge aiming toward the side the ball comes out on, dropped back down onto the platforms and climbed back into the gel-racetrack, and put the portal on the wall. I dropped the ball into the tube, ran through the jump, popped out in the top area, turned around and walked up over the bridge's railing to the other side, and had to wait for the ball before I got it. I remain very impressed with the creativity that went into the level design with original uses for regular objects.

yeah i've been a bit laid back in redoing the maps on Darth brush's visual style and then optimizing it for the workshop. Glat you like it