Thermal Discouragement Beam

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Thermal Discouragement Beams in Portal 2.

Thermal discouragement beams or lasers are a puzzle element in Portal 2. Lasers emanate from emitters, and can be used to trigger sockets and destroy turrets. They can be extended through portals, just like other testing elements. When players touch a laser, they receive a small amount of damage and are pushed away from the beam. Prolonged contact kills the player. Normal cubes block the laser, but redirection cubes point it in a different direction (parallel to the floor).

Creation

The two most important elements of any laser setup are env_portal_laser and prop_laser_catcher, which create and "catch" the laser, respectively. Two optional elements are the prop_weighted_cube with CubeType set to 2 (redirection cube) and the prop_laser_relay.

External links

Example map using this tutorial. VMF included.