It was later shown by Valve with the effects working in a presentation here. A video of the leftovers (albeit after the effects were removed) can be found here. Because of this, several community map-makers have tried (with varying success) to implement it in their maps. All of the Sticky Gel-related textures and particles remain in the final game. The gel is purple, however it is not known whether this would be the final color.

This led to it being cut from the game and eventually replaced by reflection gel in the PeTI update. While this may sound neat, it proved to be disorienting and cause motion sickness among playtesters.

Document the procedural puzzle generator.Ī gel which, when used with portals, would allow the player to walk on the walls and ceiling of test chambers.

Removed entities that still appear in Hammer and implemented entities that don't.

A few of these are related to unused or cut content.

Hidden and development-only console variables, which can be force-enabled using this plugin.

Revisional differences between ports (Windows, Mac, Linux, and potentially PS3).A lot of unused signs and posters in Old Aperture, including signs giving names to each Enrichment Sphere, as well as a map showing your location relative to the Central AI Chamber, and unused Rattmann graffiti.There's more stuff on various Wikis: Valve Developer Community, The Portal Wiki, and maybe the Combine OverWiki and/or Half-Life Wiki.There's unused UI screens also present in the game's files.'Reconstructing Science' was meant to play after the credits.

Portal 2 conversion gel