Aperture Science Hard Light Bridge

{{Technology Infobox
| image = FileHard light surface.jpg|250px
| name = Hard Light Bridge
| affiliation = Aperture Science
| type = Translucent surface
| maker =
| usedby =
* Chell
* ATLAS and P-body
| entity =
* prop_wall_projector (''Portal 2'')
| designer =
| voicedby =
| hidei =
| hideu =
| hideg = 

{{Quote|These bridges are made from natural light that I pump in from the surface. If you rubbed your cheek on one, it would be like standing outside with the sun shining on your face. It would also set your hair on fire, so don't actually do it.|GLaDOS|Portal 2|Filesp_a2_bridge_intro01.ogg}}

The '''Aperture Science Hard Light Bridge''' is a testing element in ''Portal 2'' that is used throughout the Aperture Science Aperture Science Enrichment Center|Enrichment Center.

This testing element was originally unofficial as it was introduced in ''Portal Still Alive'', but later made official when it was implemented to ''Portal 2''.

== Overview ==
* The Hard Light Bridge is a translucent but solid surface that can be redirected through Teleportation|portals to reach or serve as a blockade to certain areas.

* Bridges may be emitted horizontally or vertically depending on the position of its emitter. Horizontal bridges can be walked upon, and players can continue seamlessly along them through any portals they pass (given enough headroom). Vertical bridges act more as portable walls that can be used as obstacles (for example, to intercept Aperture Science Weighted Storage Cube|Weighted Storage Cubes).

* In the cooperative campaign of ''Portal 2'', ATLAS and P-body are sent to the Cooperative Testing Courses Light Bridge factory|Hard Light Bridge Factory in the Cooperative Testing Courses Surfaces|Hard-Light Surfaces Testing Course. In the factory, it is revealed that the bridges, like the Aperture Science Sentry Turret|Sentry Turrets, are required to pass a quality monitoring before they can be put into testing. To achieve this, each emitter is attached to a support beam in a lineup, as the quality and strength of the surface is tested against a concrete wall.

* The Mobility Gels are applicable on the bridge, allowing Test Subjects to use the gels in places where it normally would just fall through. ATLAS and P-body must utilize this method to pass one of the chambers of the Cooperative Testing Courses Gels|Mobility Gels Cooperative Testing Course.

==Related Achievements==
{|class=wikitable style="vertical-aligncenter;" width=50%
!colspan="2" style="text-alignleft"|''Portal 2 Achievements and Trophies|Portal 2''
|rowspan=2 width=64px|FileBridge Over Troubling Water.jpg
!style="text-alignleft"|Bridge Over Troubling Water (10G)
|''Complete the first Hard Light Bridge test.'' Reference to the song "WikipediaBridge over Troubled Water (song)|Bridge Over Troubled Water" by WikipediaSimon & Garfunkel|Simon & Garfunkel.
|rowspan=2 width=64px|FileHUG NAME.jpg
!style="text-alignleft"|Bridge Building (15G)
|''Complete all test chambers in the Hard-Light Surfaces co-op course.''
|rowspan=2 width=64px|FileLIMITED PORTALS.jpg
!style="text-alignleft"|Portal Conservation Society (20G)
|''Complete Chamber 3 in the Hard-Light Surfaces co-op course using only 5 total portal placements.''

== Behind the scenes ==
* The Hard Light Bridge was officially introduced briefly in a GTTV promotional showcase of ''Portal 2''. At the time, the Hard Light Bridge possessed a texture similar to the one found in ''Portal Still Alive''. The texture has since changed and was given more detail.

* In ''Portal Still Alive'', the Hard Light Bridge was simply named as a "blue wall" by the signage found in the game files.

* In ''Portal 2'', the emitters are made in the shape to that of ''Portal'''s Aperture Science Material Emancipation Grill|Material Emancipation Grill emitters, which would further prove that the Hard Light Bridge was based on the testing element in ''Portal Still Alive'' as the emitter was the Emancipation Grill model.

== Trivia ==
* The Hard Light Bridge appears to be similar in nature to the Combine powered bridge.
* The Thermal Discouragement Beam is unaffected by Hard Light Bridges.
* According to the screens seen at the start of certain test chambers, the light used to create the bridges are absorbed through vast farm fields, then filtered to create the bridges. The field shown in this video resembles the field Chell is sent to at the end of the game.
* The Hard Light Bridge appears to be opaque to Aperture Science Sentry Turret|Sentry Turrets. Unlike glass, turrets do not appear to recognize Chell if she stands behind one; however, since the turrets appear to aim with infrared lasers, it could be argued that the light from the bridge interferes with a turret's ability to detect targets (as both are very close on the electromagnetic spectrum, as seen WikipediaElectromagnetic spectrum|here).
* When standing near the bridge in the single-player campaign, Cara Mia can be heard playing slowly about 30 seconds into the audio file.

== Gallery ==
=== ''Portal Still Alive'' ===

=== ''Portal 2'' ===

FileLight bridge gt.jpg|An early Hard Light Bridge in a cut chamber.
FilePortal 2 PC Gamer 01.jpg|Early Light Bridge with early ATLAS and P-body.
FileP2TC11.png|Hard Light Bridge, seen in the GLaDOS' testing track (Portal 2) Chamber 11|Test Chamber 11.
FileP2TC17.png|Ditto, in the GLaDOS' testing track (Portal 2) Chamber 17|Test Chamber 17.
FileP2TC18.png|Ditto, in the GLaDOS' testing track (Portal 2) Chamber 18|Test Chamber 18.
FileP2TC21.png|Ditto, in the GLaDOS' testing track (Portal 2) Chamber 21|Test Chamber 21.
FileP2TC22.png|Ditto, near GLaDOS' testing track (Portal 2) Chamber 22|Test Chamber 22.
FileHub.jpg|Hard Light Bridge seen in the Hub.
FilePeti hard light emitter.png|Hard Light Bridge icon in ''Perpetual Testing Initiative''.

== List of appearances ==
* ''Portal Still Alive'' {{1st}} {{Nc}}
* ''Portal 2''
* ''Peer Review''
* ''Perpetual Testing Initiative''
*''Lego Dimensions'' {{Nc}}

CategoryAperture Science technology
CategoryPortal 2
CategoryAperture Science testing elements