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. Valve has made it for mod making purposes to make players try map and check if their mod works.

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
sdk_water	0 346 0	-80	255 255 255 300	255 255 255 20
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
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
sky_day01_06
d1_canals_09 - d1_canals_11	0 148 0	-35	240 187 117 1000	135 172 180 150
sky_day01_07
d1_canals_12	0 108 0	-35	235 166 71 1000	135 172 180 150
sky_day01_08
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
d2_coast_01	0 225 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
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	0 230 0	-15	255 252 230 400	175 199 205 150
sky_day02_09
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
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
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
sdk_3d_skybox	0 140 0	-75	253 250 217 600	208 228 230 25
sdk_cables	0 37 0	-75	255 255 255 800	255 255 255 20
sdk_faceposer	0 284 0	-70	255 255 255 200	255 255 255 20
sdk_func_detail	0 346 0	-80	255 255 255 300	255 255 255 20
sdk_hints	0 57 0	-80	255 255 255 800	255 255 255 20
sdk_lightmaps	0 163 0	-80	255 255 255 400	255 255 255 20
sdk_occluders	0 163 0	-80	255 255 255 400	255 255 255 20
sdk_phys_ballsocket sdk_phys_constraint sdk_phys_convert sdk_phys_explosion sdk_phys_hinge sdk_phys_impact sdk_phys_keepupright sdk_phys_lengthconstraint sdk_phys_magnet sdk_phys_motor sdk_phys_pulleyconstraint sdk_phys_ragdollmagnet sdk_phys_slideconstraint sdk_phys_spring sdk_phys_thruster sdk_phys_torque	0 284 0	-70	255 255 255 200	255 255 255 20
sdk_prop_types	0 346 0	-80	255 255 255 300	255 255 255 20
sdk_vehicles	0 290 0	-45	255 244 213 512	172 196 204 50