Portal Sky List

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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.

These skyboxes are available to Portal and mods utilizing its content. Portal also contains all Half life 2 skies.

bts_custom_cubemap
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sky_escape_01_
Example Map	Ideal Sun Angle	Ideal Sun Pitch	Ideal Brightness	Ideal Ambience	Ideal HDR Brightness (Scale)	Ideal HDR Ambience (Scale)	Ideal Sun Spread Angle
escape_01	N/A	N/A	N/A	N/A	N/A	N/A	N/A
sky_day01_05_hdr
Example Map	Ideal Sun Angle	Ideal Sun Pitch	Ideal Brightness	Ideal Ambience	Ideal HDR Brightness (Scale)	Ideal HDR Ambience (Scale)	Ideal Sun Spread Angle
escape_02	0 122 0	-45	249 245 202 900	192 221 226 200	-1 -1 -1 1 (.7)	-1 -1 -1 1 (.7)	0
sky_wasteland02
Example Map	Ideal Sun Angle	Ideal Sun Pitch	Ideal Brightness	Ideal Ambience	Ideal HDR Brightness (Scale)	Ideal HDR Ambience (Scale)	Ideal Sun Spread Angle
background1	N/A	N/A	N/A	N/A	N/A	N/A	N/A
testchmb_a_00	N/A	N/A	N/A	N/A	N/A	N/A	N/A
testchmb_a_01	N/A	N/A	N/A	N/A	N/A	N/A	N/A
testchmb_a_02	N/A	N/A	N/A	N/A	N/A	N/A	N/A
testchmb_a_03	N/A	N/A	N/A	N/A	N/A	N/A	N/A
testchmb_a_04	N/A	N/A	N/A	N/A	N/A	N/A	N/A
testchmb_a_05	N/A	N/A	N/A	N/A	N/A	N/A	N/A
testchmb_a_06	N/A	N/A	N/A	N/A	N/A	N/A	N/A
testchmb_a_07	N/A	N/A	N/A	N/A	N/A	N/A	N/A
testchmb_a_08	N/A	N/A	N/A	N/A	N/A	N/A	N/A
testchmb_a_08_advanced	N/A	N/A	N/A	N/A	N/A	N/A	N/A
testchmb_a_09	N/A	N/A	N/A	N/A	N/A	N/A	N/A
testchmb_a_09_advanced	N/A	N/A	N/A	N/A	N/A	N/A	N/A
testchmb_a_10	N/A	N/A	N/A	N/A	N/A	N/A	N/A
testchmb_a_10_advanced	N/A	N/A	N/A	N/A	N/A	N/A	N/A
testchmb_a_11	N/A	N/A	N/A	N/A	N/A	N/A	N/A
testchmb_a_11_advanced	N/A	N/A	N/A	N/A	N/A	N/A	N/A
testchmb_a_14	N/A	N/A	N/A	N/A	N/A	N/A	N/A
testchmb_a_14_advanced	N/A	N/A	N/A	N/A	N/A	N/A	N/A
testchmb_a_15	N/A	N/A	N/A	N/A	N/A	N/A	N/A
sky_day01_01
Example Map	Ideal Sun Angle	Ideal Sun Pitch	Ideal Brightness	Ideal Ambience	Ideal HDR Brightness (Scale)	Ideal HDR Ambience (Scale)	Ideal Sun Spread Angle
background2	N/A	N/A	N/A	N/A	N/A	N/A	N/A
escape_00	N/A	N/A	N/A	N/A	N/A	N/A	N/A
testchmb_a_13	N/A	N/A	N/A	N/A	N/A	N/A	N/A
testchmb_a_13_advanced	N/A	N/A	N/A	N/A	N/A	N/A	N/A