2 cubes, 2 levels and 2 remote doors. Make your way to the upper level and use 2 cubes to finish. Standard and reflector cubes are used. There's more than one way to complete the first part depending on how you go about it, but it's the final part that might be a slight bit perplexing.

Click here to download 2 To go

Cheers, another nice PTI map. I made a video for you - at the end I save a bit of walking with a wee cube toss:

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EDIT: Haha, on another run through I realised it would have been much simpler just to toss the cube the other way while standing on the button. You can also fire a portal between the wall and the final fizzler.

I know there's more than one way to solve. It's just a matter of leaving behind a portal in the right place. As for the cube toss on the upper level, I wasn't expecting that.

Thanks for uploading the video.
Cheers.

Cool map! I love anything that has me stumped for more than a couple of secs. Ty!

I feel pretty facepalm about the last bit after ElFarmerino's vid.. but meh.. this is the route I took 1st time

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And I thought nobody was going to jump across that goo pond and make it as well as pull off those tricks . As for cube tossing, damn, damn you cube tossers AHAHAHA. Good one. But hey, it gives me a better understanding of what to watch for in future designs. Thanks guys for taking the time to upload and share your videos. I appreciate that.

Cheers.