So this si what Runway finale was originally gonna be like...

[pilot7893]

Found this on the L4D Wikia.

Shite. Imagine this in Versus.

 

[BlueWolf72]

what.........

 

[Warped]

its extremely...dark??

 

[pilot7893]

Yes. Here's what the wiki says on it.

An early version of the Runway seen in the materials/console folder shows that the area was virtually pitch-black at one time, which the only lighting being near some parked planes. In fact, there is no 3D skybox period. It seems that the idea of Dead Air taking place in a ruined city was not a part of Dead Air from the beginning.

In addition, there is no rubble near or on the Runway, which suggests that the idea of the Airport being bombed was not developed when the Airport chapter was first made.

Of note is that the image's name is rooftoprun.vtf. The player spends the first two maps of Dead Air running across rooftops, which is where the filename likely comes from.

Imagine a map with no skybox.

 

[Sledgehammer]

I've made and played maps in complete darkness. They just aren't fun.