Half-Life 2 Sky List

This is a list of skies available in the Steam caches, along with pictures of each skybox. The light_environment settings listed (Ideal Sun Angle, Ideal Brightness, etc) are suggestions based on settings used in official maps; other values may also be appropriate. To test skies in singleplayer without recompiling the map, bring up the console and enter sv_skyname <sky_name>. Quicksave the game, load it again and the old skybox should be temporarily replaced with the new one.

Note: For HDR-capable games, you need to add _hdr to the end of sky names (Excluding Episode 1 skies), if it is not already there so it does not cause the Sky Texture to stretch. (So, if your sky name was sky_day01_01, you would make it sky_day01_01_hdr').

These skyboxes are available to Half-Life 2 and most games and mods using the Source Engine.

Note:Left 4 Dead, Counter-Strike: Global Offensive, and other newer games may not include any or all of these skyboxes.

These skies are HDR capable if mapping for games that support it.

Note: Map sdk_vehicles is not included in Half-Life 2 and it's series. It's a Test Map included in every mods created using Source SDK and with it's bases.

The table below explains the prefixes used in map filenames.

Prefix	Location
d1_trainstation	City 17 before the teleporter accident
d1_canals	Route Kanal & Water Hazard
d1_eli	Black Mesa East
d1_town	Ravenholm
d2_coast	Highway 17
d2_prison	Nova Prospekt
d3_c17	City 17 after the Nova Prospekt explosion
d3_citadel, d3_breen	The Citadel

Only outdoor maps that have both skyboxes and light_environments are referenced by this list.

sky_borealis01
Example Map	Ideal Sun Angle	Ideal Sun Pitch	Ideal Brightness	Ideal Ambience
None	0 185 0	-2	245 255 168 40	120 226 255 10
sky_day01_01
d1_trainstation_01 - d1_trainstation_06	0 165 0	-35	237 218 143 800	190 201 220 100
sky_day01_04
d1_canals_01 d1_canals_01a d1_canals_02	0 165 0	-55	248 234 205 1000	194 236 252 175
sky_day01_05
Example Map	Ideal Sun Angle	Ideal Sun Pitch	Ideal Brightness	Ideal Ambience
d1_canals_03	0 165 0	-83	243 224 158 1200	194 236 252 225
d1_canals_05	0 104 0	-35	248 233 186 800	140 167 174 150
d1_canals_06 d1_canals_07	0 104 0	-35	248 233 186 860	140 167 174 150
d1_canals_08	0 104 0	-35	243 219 143 860	140 167 174 150
de_prodigy	0 316 0	-70	249 227 155 800	126 171 207 1000
sky_day01_06
d1_canals_09 - d1_canals_11	0 148 0	-35	240 187 117 1000	135 172 180 150
cs_compound	0 104 0	-35	248 233 186 860	140 167 174 150
sky_day01_07
d1_canals_12	0 108 0	-35	235 166 71 1000	135 172 180 150
sky_day01_08
Example Map	Ideal Sun Angle	Ideal Sun Pitch	Ideal Brightness	Ideal Ambience
d1_canals_13 d1_eli_01	0 108 0	-35	235 155 71 1000	105 142 165 120
sky_day01_09
d1_eli_02	0 12 0	-45	175 230 239 65	83 104 130 50
d1_town_01 - d1_town_03	0 12 0	-45	175 230 239 50	43 45 57 5
sky_day02_01
d1_town_05	0 225 0	-25	254 242 160 400	172 196 204 80
sky_day02_02
Example Map	Ideal Sun Angle	Ideal Sun Pitch	Ideal Brightness	Ideal Ambience
d2_coast_01	0 225 0	-20	255 244 213 700	172 196 204 50
de_port	0 230 0	-20	255 244 213 700	172 196 204 50
sky_day02_03
d2_coast_03	0 280 0	-45	243 238 224 500	172 196 204 100
d2_coast_04	0 290 0	-45	243 238 224 500	172 196 204 50
sky_day02_04
d2_coast_05	0 240 0	-45	243 238 224 400	172 196 204 50
sky_day02_05
Example Map	Ideal Sun Angle	Ideal Sun Pitch	Ideal Brightness	Ideal Ambience
d2_coast_08	0 135 0	-30	255 255 249 448	172 196 204 100
sky_day02_06
d2_coast_09	0 270 0	-20	255 252 230 475	172 196 204 120
sky_day02_07
d2_coast_10	0 225 0	-15	255 252 230 500	183 204 210 140
d2_coast_11	0 225 0	-15	255 0 0 400	175 199 205 150
sky_day02_09
Example Map	Ideal Sun Angle	Ideal Sun Pitch	Ideal Brightness	Ideal Ambience
d2_coast_12	0 200 0	-5	237 232 209 70	122 140 169 60
d2_prison_01	0 200 0	-5	217 226 234 0	122 140 169 20
d2_prison_02 - d2_prison_08	0 200 0	-5	221 232 240 20	103 143 184 125
sky_day02_10
d2_coast_07	0 135 0	-30	255 255 249 448	172 196 204 100
sky_day03_01
d3_c17_01	0 165 0	-35	237 218 143 800	190 201 220 100
d3_c17_02	0 126 0	-25	245 200 150 1000	148 173 205 60
d3_c17_03	0 150 0	-30	236 218 145 600	160 184 211 150
sky_day03_02
Example Map	Ideal Sun Angle	Ideal Sun Pitch	Ideal Brightness	Ideal Ambience
d3_c17_04	0 140 0	-35	236 218 145 650	160 184 211 150
d3_c17_05	0 120 0	-35	236 218 145 650	160 184 211 150
sky_day03_03
d3_c17_06a	0 120 0	-40	236 218 145 700	160 184 211 150
d3_c17_06b d3_c17_07	0 115 0	-35	236 218 145 700	160 184 211 150
sky_day03_04
d3_c17_08	0 53 0	-60	239 207 141 350	75 96 116 300
d3_c17_09	0 50 0	-35	237 218 143 650	190 201 220 100
d3_c17_10a d3_c17_10b	0 50 0	-20	238 207 142 600	190 201 220 100
sky_day03_05
Example Map	Ideal Sun Angle	Ideal Sun Pitch	Ideal Brightness	Ideal Ambience
d3_c17_11	0 82 0	-12	238 200 128 450	75 96 116 150
d3_c17_12	0 82 0	-8	238 200 128 450	75 96 116 150
d3_c17_12b	0 40 0	-8	239 207 141 350	75 96 116 300
d3_c17_13 d3_citadel_01	0 82 0	-12	238 200 128 450	75 96 116 250
sky_day03_06
d3_breen_01 d3_citadel_05	0 280 0	-21	221 112 13 300	255 255 255 20
sky_wasteland02
None	0 28 0	-35	255 255 249 524	172 196 204 100
sdk_vehicles	0 290 0	-45	255 244 213 512	172 196 204 50