Hope it fit's the rules, not sure what was meant by "portal climbing"
You need to swap from bottom to top while standing on it in this one.

https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=383857076

Same here, I just finished it and you need to swap from bottom to top while standing on a bridge...

Edit : I also have a question about the next laser challenge, When will the page be made? I started right when i read the comment from quaternary and it's already finished, even sort of high rated as well at the moment I write this.
It never happend before I finished a map before a page was made for a compo :)

My very first underground style hammer map, I thought since it's the first time to create my own style for it.
The chambers where never finished building...
https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=356321373
I hope you enjoy as much as I enjoyed creating. Really, I learned a lot :)

Oh yeah, still interested but to be honest this one was just too much for me as hammer noob.
I find it very hard to design something in hammer, I use the pti to design a puzzle and then rebuild it completely in hammer which would be hard to do with a BTS map.

I'll follow :)
https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=349041336

Thanks again for the votes!
I would allow every item exept fizzlers for the next challenge, I give carte blanche on the puzzle as long as there are no fizzlers at all.
The PeTI exit door fizzler is ok though, would be kind of hard to not have that one with a PeTI map. Just make sure it can't be used by the player (killing portals and/or cubes with it).
I think some interesting puzzles can come out of this challenge :)
Good luck!

Weighted buttons are allowed as long as they are of no use when the player presses it.

1) LPChip
2) Talisac
3) marKiu

All right, got something :)
https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=341625783
Please tell me if you find unintended things

As long as the player doesn't need to use the laser to activate anything it should be ok, we don't want confusing connection lines ;)