Solved it all but don't understand why I got the exit door to open when I went back through. Oh well - still fun thanks for creating.

Why did I have to solve it multiple times?

Three solutions actually, but poorly executed back in the day

Is this a map based on three solutions or exploits found in the original map?

Thanks. I wish I could use this in my levels, but I can't use hammer :(

@Unowninator thx! It's Portal Device Inverter

Favorite. BTW, what's PDI stand for?

Thanks :D

nice chamber. Easy and fun. Fun nice repeat function

@pa1ntmaster I should probably try Aperture Tag

Looking back this map just now reminds me of the paint fizzlers from Aperture Tag, only for portals....

--My name is Four, like the number--
Repost this post on any maps that are divergent with their 4 stars and maybe get a 5

@dante Much appreciated! :)

Not sure if these ideas are any good, just trying to provide inspiration.

One more idea: Blue and Orange walls
Some walls, you can only place portals on when the inverter is in blue-only mode, and others, only when orange is activated. This would allow some strategy when there is an inverter that you cannot access, or with the timed inverter.

Yes... I will try to construct one at home, see what kinds of puzzles can be made with it. One question... at the beginning, there is a portal gun, but only with the crosshair and no orange/blue arcs. I haven't seen the option to have that kind of portal gun.

Very creative concept and I look forward to seeing puzzles that rely more on the inverter, such as areas where you can't access the inverter, so you have to plan ahead.

Another idea would be timed inverters, where you start with blue only portals, and when you pass through the inverter, your portals would turn orange for a certain amount of time before turning back. The puzzle would allow you to see a way to do it if you had untimed access to both portals, but it wouldn't work without super-ninja skills, so you would have to put that solution out of your mind and try to find an alternate way to do it with timed inverters.

@dante There is a lot of triggers a relay logic behind it. And this was also kinda not focused on the inverter. Thanks for your comment!

Ok, I think the mechanic is more interesting with cleansers. Still, it's a nice hammer programming. How do you do it?

@dante This only shows how you would solve regular puzzle with it. Thanks!

It's an interesting mechanic, but it seems to me like the tests would have almost the same solution with a dual portal device...

@pa1ntmaster Thanks a lot!

Very nice

Only a couple of complaints:
1) The lift could use some grating and a better-positioned player clip
2) The faith plate above the cube dropper appears to be backwards, along with another weird clipping surface.

The Wheatley line kinda ran through my head too. If only there was some good GLaDOS dialogue to work in...

@Powerman123 Oh I did try to put Wheatley in but he kind of did not fit the test. Thanks for feedback!

Quite a unique type of puzzle. The whole time I could hear an imaginary wheatley in my head saying:

"Oh, here's an idea: since making tests is so difficult, why don't you just keep solving THIS test? Same one! And I can just, like, watch you solve it!"

@TopazGiraffe2973 Glad you liked it! And yeah, I was aware of your way (actually had a small chamber with this being the solution). Thanks a lot!

Just watched the walkthrough, I didn't do the last one the same, I went to the back, stood on the cube, then portaled my way up on the bridge with the cube, then blocked the laser above me. [/spolier]

Very nice! The last one was very clever. Good job! Make more if you can, I like this very much :D