Portals: Difference between revisions

Once the player obtains the Portal Device, they can create a portal on a surface by aiming at the spot they want to put the portal and pressing the primary or secondary fire key. If the player has only acquired the Single Portal Device, both fire keys produce the primary portal color. If they have acquired the Dual Portal Device, the primary fire key produces the primary color and the secondary fire key produces the secondary color. Portals cannot be placed on surfaces that are not made of the appropriate material (white walls usually indicate this material), moving, not flat, or not large enough for a portal to fit onto it. Portals also cannot be placed while looking through currently existing portals.

Portals transmit matters and light, this is proved by {{Tooltip|Excursion Funnels, Thermal Discouragement Beams and Hard Light Bridges|GLaDOS claimed that these matters are made from "pure light"}} can pass through portals