Skyboxes

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Overview

The "Skybox" is a method of creating backgrounds to make a level look bigger than it really is. When a Skybox is used, the level is enclosed in a cuboid (six sides), with specially made skybox textures drawn on it. Many skyboxes were cut or heavily modified during Half-Life 2's development. Many have been lost, and are only present in Valve's archives. The following is a list of skyboxes found in the leak, along with their original versions/possible replacements. A few older skies were kept as placeholders, having been palette-swapped (purple squares) or brightened.

C17

  • C17_01
  • Fate: Cut
  • C17_02
  • Fate: Used extensively; Cut just before release
  • C17_02 (Fixed)
  • Fate: Used extensively; Cut just before release
  • C17_03
  • Fate: Original lost - replaced with copy of Wasteland02 in leak
  • C17_04
  • Fate: Re-used in retail as sky_day03_02
  • C17_04 (Alternate)
  • Fate: Cut - Re-used in Counter-Strike: Source as sky_cs
  • C17_05 (<2001)
  • Fate: Cut - Extremely old sky
  • C17_05 (>2001)
  • Fate: Cut
  • Terminal
  • Fate: Cut - Variant of C1702


  • Trainstation
  • Fate: Re-used in retail as sky_day_01_01
  • Trainstation (Fixed)
  • Fate: Original version of Trainstation

Wasteland

  • Wasteland01
  • Fate: Cut
  • Wasteland01 (Fixed)
  • Fate: Cut
  • Wasteland02
  • Fate: Present in retail - Used as default/testing sky
  • Wasteland03
  • Fate: Cut
  • Wasteland04
  • Fate: Parts re-used in retail as sky_day02_02
  • Wasteland04 (Fixed)
  • Fate: Cut
  • Wasteland05
  • Fate: Parts re-used in retail as sky_day02_05
  • Wasteland05 (Fixed)
  • Fate: Cut
  • Depot01
  • Fate: Cut

Quarry/Ravenholm

  • Quarry01
  • Fate: Re-used in Half-Life: Source
  • Quarry01 (Alternate)
  • Fate: Cut - Re-used in Counter-Strike: Source as sky_hav
  • Quarry03
  • Fate: Re-used in retail as sky_day01_09

Airexchange

  • Airex01
  • Fate: Cut

Borealis

  • Borealis01
  • Fate: Cut

Spire

  • Spire01
  • Fate: Cut - Extremely old sky

Vertigo/Palace

  • Palace01
  • Fate: Cut

Citadel

  • Citadel01
  • Fate: Cut
  • Citadel01 (Fixed)
  • Fate: Cut
  • Citadel02
  • Fate: Cut - Large amount of compression damage indicates a palette-swap, Re-used in Counter-Strike: Source as sky_italy
  • Citadel02 (Fixed)
  • Fate: Cut - Large amount of compression damage indicates a palette-swap, Re-used in Counter-Strike: Source as sky_italy