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The Orange Box: Portal Hints
How can I get over this glass wall with just two portals?
1 of 6: Start by putting the orange portal up on the extended wall section.
2 of 6: Quicksave before putting the blue portal on the floor, since you need to get it placed just right the first time.
3 of 6: The floor spot that's about halfway between the glass wall and the doorway you entered this area through is a good one to try.
4 of 6: Put the blue portal on the floor and fall through it, then see if you can fall through it again after coming out of the orange portal.
5 of 6: Using the movement keys can help a little in guiding your descent, but not a lot.
6 of 6: If your first blue portal placement doesn't work out for you, quickrestore and try again in another spot.