Emancipation Grid

An Emancipation Grid (also Emancipation Grill or more commonly, Fizzler), is a special energy field in Portal 2 which resets the portal gun of any player (destroying both portals) and vaporizes other objects that touch it.

In Portal, the Emancipation Grid is composed of two models, a trigger-textured invisible trigger_portal_cleanser and a particle system emitter (info_particle_system).

In Portal 2, however, it is composed of an entity (trigger_portal_cleanser) combined with a pair of models (fizzler_mdl). The brush used for the trigger should be nodraw except for one face which has a fizzler texture.

If a fizzler is in a stacked form, several entities should be used as the portal gun will make the field flash white when firing on it; For consistency, official maps use this approach.

External links

• Example map using this tutorial. VMF included.