Now then heres the first trigger. Trigger once is a trigger that only turns on one time so if you want to create a section with it turning on the stuff you puted in then put it at the entrance and it will look like everything turning on. Another thing you can do with trigger once is you can create a trap section if your making a story like in portal 2 in chamber 20 when wheatly is getting ready to bust you out. If you have any questions i will resolve it in the comment section.

Trigger multiple is a trigger that operates once and does not keep them on only if you walk on it like a door opening in a chamber enterance also it can open a trap section for a split section of time like if you want to make a trap when a player walks over it. And another example is if you want something shutting on for once like if you want a companion cube coming out of the dropper.

This one will autosave on a section if a player dies so if they get to a far section of your test and they die then they will be respawned on where the trigger autosave is. Also trigger autosave cannot power anything (I think cause i never really tested it) so your going to have to put another trigger inside it.

Now you know what they do so heres some tips for the test chamber your gonna make with the triggers. Triggers cannot be on the air only on the floor on the wall and on the cealing so your going to need hammer to do that if you want to put them in the air. So i hope you all found this helpful so you can create the perfect chamber please comment if you think this was helpful and good luck on createing the perfect chamber!