Shortly after the citadel exploded, Gordon's train was teleported to a beach in which was farther away from white forest than he anticipated. He makes his way through the coastline, caves, and outlands to destroy a combine weapon capable of destroying the rocket in white forest.
Facility Taken by The Combine.
Nice, love the lighting :D
the sprite doesnt look right yet. you can make two more sprites at the ends and then reduce the HDR brightness to .25, then the whole light tube will look good.
also, make sure you are using a very bright "light_spot" with a very wide angle, and a very dull "light" of the same color...the ceiling is too lit for that kind of light.