At Arm's Length

Complete this fiendish puzzle using every skill at your disposal--except the ability to touch any part of the test chamber. There are ample visual clues and meaningful signage for an alert test subject to use to progress through the four stages of this puzzle, and important portal surfaces have placement helpers to keep portals straight. Use your gels, momentum and portal placement wisely.

Basic map geometry and puzzle structure laid out in PeTI, then optimized and detailed in Hammer.

Revision 2:

• Further optimized PeTI's mess, converting all unseen surfaces to nodraw and consolidating some brushes. Revision 3:
• Whoops. Fixed minor but silly texture error. Revision 4:
• Steam upload error. Revision 5:
• For some unknown reason the faith plate target was interfering with the portal placement helper under it. Fixed this by making the portal surface exactly large enough for one portal and adding NPS brushes and portal bumpers to either side. All portal surfaces where positioning is essential should now have info_placement_helpers, but players are also free to try to come up with other solutions. Revision 6:
• Changed some grating to glass and some geometry to eliminate cube-tossing exploit. I will never require cube-tossing as a solution to any of my puzzles. :)
• Changed some geometry to func_details to improve performance.
• Fixed the problem with the faith plate target once and for all by editing the faith_plate_target.vmf instance, which had a nonfunctional placement helper that overrides any you place which was rotated in the wrong directions to boot.